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TALKS AND TEACHING

 

Link: Actual courses and seminars (Click "Vorlesungen & Seminare")


Below you find information on:

Regular Teaching

Invited Short Courses

Talks for General Audience

Talks at other Universities or Conferences

 

 

 


Regular Teaching

List of Courses and Lectures:

 

SS 1980:       Kommutative Algebra I  (4+2h/w, University of Basel)

 

WS 1980/81: Kommutative Algebra II (4+2h/w, University of Basel)

 

SS 1982:       Lokale Kohomologie (4+2h/w, University of Basel)

 

WS 1981/82: Mathematik für Chemiker und Naturwissenschafter I (4+1h/w, University of Basel)

                      Geometrie (2h/w HTL Olten)

 

SS 1982:       Mathematik für Chemiker und Naturwissenschafter II (2+1h/w, University of Basel)

 

WS 1982/83: Mathematik für  Chemiker und Naturwissenschafter I (4+1 h/w, University of Basel)  

 

SS 1983:       Mathematik für Chemiker und Naturwissenschafter II (2+1h/w, University of Basel)

                     Lokale Kohomologie algebraischer Varietäten (4h/w, University of Basel)

 

WS 1983/84: Algebraische Geometrie I (4+2h/w)

 

SS 1984:       Algebraische Geometrie II (4+2h/w)

 

WS 1984/85: Algebraische Kurven (4+2h/w)

 

SS 1985:       Algebraische Vektorbündel (4+2h/w)

 

WS 1985/86: Algebra (4+2h/w)

 

SS 1986:       Kommutative Algebra (4+2h/w)

 

WS 1986/87: Algebren von Differnitialoperatoren (4+2h/w)

 

SS 1987:       Algebraische Topologie (4+2h/w)

 

WS 1987/88: Elliptische Kurven (4+2h/w)

 

SS 1988:       Mathematische Modelle und Geräte (4h/w)

 

WS 1988/89: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1989:       Algebraische Funktionen (4+2h/w)

 

WS 1989/90: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1990:       Algebraische Geometrie (4+2h/w)

 

WS 1990/91: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1991:        Lokale Algebra (4+2h/w)

 

WS 1991/92: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1992:       Kommutative Algebra (4+2h/w)

 

WS 1992/93: Projektive Geometrie (4+2h/w)

 

SS 1993:       Geometrie I für Sekundarlehrer (3+1h/w)

 

WS 1993/94: Kommutative Algebra (4+2h/w)

 

SS 1994:       Geometrie I für Sekundarlehrer (3+1h/w)

 

WS 1994/95: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1995:       Geometrie I für Sekundarlehrer (3+1h/w)

                     Ebene Algebraische Kurven (2+1h/w)

 

WS 1995/96: Kommutative Algebra und Algebraische Geometrie I (4+2h/w)

 

SS 1996:       Geometrie I für Sekundarlehrer (3+1h/w)

                     Kommutative Algebra und Algebraische Geometrie II (4+2h/w)

 

WS 1996/97: Kommutative Algebra I (4+2h/w)

 

SS 1997:       Geometrie I für Sekundarlehrer (3+1h/w) 

                      Einführung in die Algebraische Geometrie (2+1h/w)

 

WS 1997/98: Lokale Kohomologietheorie (4+2h/w)

 

SS 1998:       Garben und Schemata (4+2h/w)

 

WS 1998/99: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 1999:       Algebraische Geometrie (4+2h/w)

 

WS 1999/00: Analysis für Sekundarlehrer (4+1[+1]h/w)

                     Algebraische Kurven (2+1h/w)

 

SS 2000:       Kommutative Algebra (4+2h/w)

 

WS 2000/01: Analysis für Sekundarlehrer (4+1[+1]h/w)

 

SS 2001:       Algebraische Geometrie (4+2h/w)

 

WS 2001/02: Analysis für Sekundarlehrer (4+1[+1]h/w)

                     Algorithmische Methoden der Algebraischen Geometrie (4+2h/w)

 

SS 2002:       Kommutative Algebra (2+1h/w)

 

WS 2002/03: Analysis für Sekundarlehrer (4+1[+1]h/w)

                      Kohomologie und Garben (2+1h/w)

 

SS 2003:       Lokale und globale Methoden der Algebraischen Geometrie (4+2h/w)

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

 

WS 2003/04: Kommutative Algebra (4+2h/w)

                     Einführung in die Mathematische Behandlung der Naturwissenschaften I (4+1h/w)

 

SS 2004:       Ausgewáhlte Kapitel der Kommutativen Algebra (2+1h/w)

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

                      Einführung in die Mathematische Behandlung der Naturwissenschaften II (2+1h/w)

 

WS 2004/05: Algebra I (4+2h/w)

                      Analysis für die Naturwissenschaften (4+1h/w)

 

SS 2005:       Kommutative Algebra (4+2h/w)

 

WS 2005/06: Lokale Kohomologie (4+2h/w)

                      Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

                      Analysis für die Naturwissenschaften (4+1h/w)

 

SS 2006:       Kommutative Algebra (4+2h/w)

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

 

WS 2006/07: Ausgewählte Kapitel aus der Kommutativen Algebra (4+2h/w)                  

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

                     Analysis für die Naturwissenschaften (4+1h/w)

 

FS 2007:       Homologische Algebra (4+2h/w)

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

 

HS 2007:       Lokale Kohomologie und Garbenkohmologie (4+2h/w)

                     Analysis für die Naturwissenschaften (4+1h/w)

 

FS 2008:       Kommutative Algebra (4+2h/w)

                     Zahlentheorie für Studierende des Lehramts an der Sekundarstufe I (2h/w)

 

HS 2008:       Algorithmische Methoden der Algebra (4+2h/w)

                     Analysis für die Naturwissenschaften (4+1h/w)

 

FS 2009:       Kommutative Algebra (4+2h/w)

 

HS 2009:       Lokale Kohomologie und Garbenkohomologie (4+2h/w)

                      Analysis für die Naturwissenschaften (4+1h/w)

 

FS 2010:       Kommutative Algebra (4+2h/w)

                     Around Castelnuovo-Mumford Regularity (2+2h/w)

 

HS 2010:       Analysis für die Naturwissenschaften (4+1h/w)

 

FS 2014:       Kommutative Algebra (4+2h/w; taught after retirement)

 

FS 2016:       Kommutative Agebra (4+2h/w; taught after retirement) 

 

Seminars:

Beginning in SS 1984 each Semester a Seminar of 2h/w on various subjects from Commutative Algebra and Algebraic Geometry for PhD and Master students

 

Seminars for future High school teachers on elementary subjects from Algebra, Applied Algebra, Cryptography, Geometry and Topology

 

FS 2008-FS 2010 corresponsible for the "Oberseminar Algebraische Geometrie" with Proff. Andrew Kresch and Christian Okonek

 

 

 

 

 


Invited Short Courses

18. Introduction to Local Cohomology Modules: A Short Course of four Lessons, given at the University of Science in Thai Nguyen / Vietnam, 17. 18. 19. and 20. September 2017

 

17. Introduction to Weyl Algebras and D-Modules: 4 Lessons and two Tutorial Sessions held in the framework of the "Workshop on Local Cohomology" at St. Joseph's College Irinjalakuda, Kerala, India, 20. June - 2. July 2016 (Lecture Notes available as PDF under "Publikationen -> Lecture Notes and Presentations")

 

16. Around the Circle: 12 Lectures and 6 Exercise Sessions, held in the framework of a Summer School for Mathematics Teachers at High Schools in Kabale Region, St. Mary's College Rushoroza, Kabale, Uganda,  28. April - 2. May 2014 (Lecture Notes available as PDF under "Publikationen -> Lecture Notes and Presentations")

 

15. Brüche und Kurven - ein Blick auf die Diophantische Geometrie: Weiterbildungskurs für Lehrerinnen und Lehrer an Maturitätsschulen, 9. April 2014, Institut für Erziehungswissenschaften / Institut für Mathematik, Universität Zürich (Vorlesungsskript als PDF unter "Publikationen -> Lecture Notes and Presentations")

 

14. Weyl Algebras, Universal Gröbner Bases, Filtration Deformations and Characteristic Varieties: Four Twin Lectures held at the Vietnam Institute for Advanced Study in Mathematics (VIASM) Hanoi/Vietnam, 12.-26. November 2013 (Lecture Notes Available as PDF under "Publikationen -> Lecture Notes and Presentations")

 

13. Introduction to Weyl Algebras and D-Modules: Five Twin Lectures held at the University of Thai Nguyen/Vietnam, 1.-10.November 2013 (Lecture Notes Available as PDF under "Publkationen -> Lecture Notes and Presentations")

 

12. Surface Topology - in the Class Room and Beyond: 15 Lectures and 5 Exercise Sessions held at Kabale University/Uganda in the framework of a Summer School on the project "Actual Developments and Teaching of Mathematics" of the North-South Cooperation Zürich-Uganda 7.-12.January 2013

 

11. Homological Algebra and Local Cohomology: Seven Twin Lectures with Exercices held at the University of Thai Nguyen/Vietnam 28. October - 14. November 2011 (Presentation Available as PDF under "Publikationen -> Lecture Notes and Presentations")

 

10. Bounding Cohomology of Projective Schemes: Five Lectures and an Exercise Session, held at the CIMPA-Tubitak Summer Schoolon Commutative Algebra and Applications to Combinatorics and AlgebraicGeometry, Istanbul/Turkey 15.-25. September 2010 (Lecture Notes available as PDF under "Publikationen -> Lecture Notes and Presentations")

 

9. An Introduction to Local Cohomology: Four Twin Lessons held at the University of Thai Nguyen/Vietnam 26.-29.November 2007

 

8. Cohomology of Projective Varieties: Six Lectures held at the Korea Advanced Institute of Science and Technology (KAIST), Daejeon/Korea, 2.-14.August 2006

 

7. Local Cohomology I-V: CIMPA School on Commutative Algebra, Institute of Mathematics, Hanoi/Vietnam, 26.-30. December 2005

 

6. Four Lectures on Local Cohomology: International Workshop on Commutative Algebra and Algebraic Geometry, St. Joseph's College at Irinjalakuda, 18.-23.July 2005, Irinjalakuda, Kerala/India

 

5. Local Cohomology-Basic Notions and Applications to Algebraic Varieties: Summer School, University of Quy Nhon/Vietnam, 8.-18.September 1999

 

4. Left-Vanishing of Graded Local Cohomology Modules: five lectures, given at the "Workshop on Commutative Algebra and Computer Algebra", Institute for Theoretical Physics and Mathematics, Tehran/Iran, 29.June-7.July 1997

 

3. Local Cohomology: Workshop, given jointly with R.Y.Sharp at the University of Muenster/Germany, 12.-17.December 1993

 

2. Lokale Kohomologietheorie und Anwendungen: Summer School, University of Vechta/Germany, September 1982

 

1. Cohomological Properties of Blowing-Up and Conormal Cones: A series of lectures, given at the Spring School on Commutative Algebra (with Ch.Rotthaus), Politecnico di Torino/Italy, March 1979



Talks for General Audience

32. Why to become a Mathematician?: Pedagogical University of Thai Nguyen, Vietnam, 17. September 2017 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

31. Why to become a Mathematician?: Pedagogical University of Ho Chi Minh City, Vietnam, 7. September 2017 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

30. Why to become a Mathematician?: Sahrdaya College of Advanced Studies of Arts and Science, Kodakara, Thrissur, Kerala, India, 30. June 2016 (Presentation available under "Publikaionen -> Lecture Notes and Preprints")

 

29. Why to become a Mathematician?: St. Joseph's College Irinjalakuda, Kerala, India, 28. June 2016 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

28. Truth and Provability: St. Joseph's College Irinjalakuda, Kerala, India, 24. June 2016 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

27. The Grasp for Infinity: St. Josephs's College Irinjalakuda, Kerala, India, 22. June 2016 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

26. Why to become a Mathematician?: St. Mary's College Rushoroza, Kabale Uganda, 1. May 2014 (Presentation available under "Publikationen -> Lecture Notes and Preprints")

 

25. Blowing-Up and its Visualization: St. Mary's College Rushoroza, Kabale, Uganda, 29. April 2014 (Presentation available under "Publikationen -> Lecture Notes and Preprints)

 

24. Strips, Tubes, Bottles, Cups, Umbrellas-a Few Visualizations of Surfaces: St. Mary's Rushoroza College, Kabale, Uganda, 28. April 2014 (Presentation available under "Publikationen -> Lecture Notes and Preprents")

 

23. Why to Become a Mathematician?: University of Thai Nguyen, Thai Nguyen/Vietnam, 9.November 2013; University of Hué, Hué/Vietnam, 6.December 2013; Institute of Mathematics at the Vietnam Academy of Science and Technology (VAST) Hanoi/Vietnam, 18.December 2013 (Presentation Available under "Publikationen -> Lecture Notes and Preprints")

 

22. Mathematics...: St. Joseph's College Irinjalakuda, Kerala/India, 28.July 2005

 

21. Higher Education in Switzerland: St. Joseph's College Irinjalakuda, Kerala/India, 28.July 2005

 

20. Porträt der Vorlesung MA 460/ Zahlentheorie für Studierende des Lehramts der Sekundarstufe I an der PHZH: Pädagogische Hochschule Zürich, Zürich/Switzerland, 11. May 2005

 

19. Unsichtbares sichtbar machen - Modelle von Flächen: Departementskolloquium T, Zürcher Hochschule Winterthur, Winterthur/Switzerland, 11.January 2005

 

18. Ein Streifzug vom Anschaulichen ins Abstrakte: Fachschaftstag der kantonalen Fachschaft Mathematik der Gymnasien des Kantons Luzern, Institut für Mathematik der Universität Zürich/Switzerland, 9.December 2004

 

17. Kurzporträt unseres Instituts: Fachschaftstag der kantonalen Fachschaft Mathematik der Gymnasien des Kantons Luzern, Institut für Mathematik der Universität Zürich/Switzerland, 9.December 2004

 

16. Bologna und die Mittelschulen: Entlassung der Maturandinnen und Maturanden der Kantonsschule Rychenberg Winterthur, Stadthaus Winterthur, Winterthur/Switzerland, 3.September 2004

 

15. Discrete and Continuous-Visualized by Surfaces: Bombay Mathematcal Colloquium, Nehru Science Center, Bombay/India, 22.November 2002

 

14. Examples of Visualizations in Mathematics: Seminar on Perspectives in Mathematics Education, Bombay/India, 16.December 2000

 

13. Higher Education in Switzerland: University of Quy Nhon/Vietnam, 14.September 1999; University of Thay Nguyen, Thay Nguyen/Vietnam, 24.September 1999

 

12. Das Studium der Mathematik an der Universität Zürich: Orientierungsveranstaltung ueber Mathematik und Physik der Studien- und Berufsberatung St. Gallen, Kantonsschule St.Gallen/Switzerland, 13.January 1999

 

11. About the Educational System in Switzerland: University of Quy Nhon/Vietnam, 9.September 1997

 

10. Sich im Unendlichen Treffen: Volkshochschule Zuerich, University of Zürich/Switzerland, 22.November 1996

 

9. Aufblasungen-abstrakt und anschaulich: Conference "Zwei Tage mit Jacob Steiner und Ludwig Schläfli", Thun/Switzerland, 16.March 1996

 

8. David Hilbert: Volkshochschule Zürich, University of Zürich/Switzerland, 27.January 1997

 

7. Wie wird man Mathematiker? 13. Kolloquium für Mathematiklehrer, University of Basel/Switzerland, 2.November 1994

 

6. Warum wird man Mathematiker? Antrittsvorlesung, University of Zürich/Switzerland, 14.June 1993

 

5. Grenzen des exakten Erkennens: Vereinigte Bibelgruppe, University of Zürich/Switzerland, 18.May 1992

 

4. Computerbilder Algebraischer Flächen am Beispiel von Aufblasungen: Hans-Leimberger-Gymnasium Landshut/Germany, 2.April 1992

 

3. Vom Möbius-Band zur Hilbert-Funktion: University of Zürich and National Research Exibition Heureka, Zürich/Switzerland, 16.July 1991

 

2. La discrètisation du continu en géométrie algébrique: CERFIM Locarno/Switzerland, 9.November 1990

 

1. Betrachtungen über eine Kurvensingularität: Antrittsvorlesung, University of Zürich/Switzerland, 6.June 1984

 

 


Invited Talks at other Universities or Conferences

160. My Work with Peter Schenzel - Reminiscence of a Friendship  and a Cooperation 1979 - 2017: Workshop on Commutative Algebra at the University of Osnabrueck, October 26 - 28, 2017 (in Honor of the 70th Birthday of P. Schenze)l, Osnabrueck, Germany, 26. October 2017 (Presentation Available under "Pulikationen -> "Lecture Notes and Presentations")

 

159. Results and Problems around Rees Rings and Blowups with a Glance to Visualization: International Conference on Commutative Algebra and its Interaction to Combinatorics, Discrete Geometry and Singularity Theory, Hanoi and Ha Long, September 11 - 15, 2017  (in Honor of the 60th Birthday of L.T. Hoa), Ha Long / Vietnam, 15. September 2017

 

158. From Severi's Theorem on Linear Systems on Surfaces of to Falting's Annihilator Theorem for Local Cohomology Modules: Pedagogical University of Ho Chi Minh City, Ho Chi Minh City / Vietnam, 6. September 2017

 

157. Extremal secant varieties and syzygies of projective surfaces: Institute of Mathematics of the Vietnamese Academy of Science and Technology, Hanoi / Vietnam, 30. August 2017

 

156. Projective varieties of maximal sectional regularity: Colloquium in Mathematics, Tata Institute of Fundamental Research, Bombay/India, 7. July 2016

 

155. Bounding cohomology of coherent sheaves over projective schemes: Colloquium in Mathematics, Indian Institute of Technology, Bombay/India, 5. July 2016

 

154. Bounding patterns for the cohomology of vector bundles: 2016 Algebraic Geometry Workshop on:"Defining Equations of Complex Projective Varieties and Related Topics", 28.-29. January 2016, Puykong National University, Busan/Korea, 29. January 2016

 

153. Projective varieties of maximal sectional regularity: International Conference on Commutative Algebra and its Interactions to Algebraic Geometry and Combinatorics (in Honour of the 60th Birthday of N.V.Trung), Hanoi, 16.-20.December 2013, Vietnam Institute for Advanced Study in Mathematics (VIASM) and Institute of Mathematcs at the Vietnam Academy of Science and Technology (VAST), Hanoi/Vietnam, 17.December 2013

 

152. Local duality and finiteness of local cohomology: Ho Chi Minh University of Science, Ho Chi Minh City/Vietnam, 26.October 2013

 

151. Results and open problems around the asymptotic behavior of cohomology: Ho Chi Minh University of Science, Ho Chi Minh City/Vietnam, 25.October 2013; University of Thai Nguyen, Thai Nguyen/Vietnam, 5. November 2013; Institute of Mathematics at the Vietnam Academy of Science and Technology (VAST), Hanoi/Vietnam, 20.November 2013; University of Hué, Hué/Vietnam, 5. December 2013

 

150. Cohomological patterns of graded modules and vector bundles: Ho Chi Minh University of Science, Ho Chi Minh City/Vietnam, 24.October 2013; Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi/Vietnam, 3.December 2013

 

149. Characteristic varieties of modules of differential operators and the Castelnuovo-Mumford regularity of annihilators: Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi/Vietnam, 17.October 2013

 

148. Castelnuovo-Mumford regularity-a survey: Mathematics Seminar, Makerere University, Kampala, Uganda, 23. January 2013 (Presentation Available under "Publikationen -> Lecture Notes and Presentations")

 

147. Castelnuovo-Mumford regularity of annihilators, Ext- and Tor-modules,  Mathematics Seminar, PohTech, Pohan/South Korea 16. March 2012

 

146. Projecting algebraic varieties: Algebra Seminar, Institute of Mathematics, Vietnam Academy of Science and Technology, Hanoi, Vietnam, 23. November 2011

 

145. On blowing up: Pedagogical University of Hué, Vietnam, 17. November 2011

 

144. On blowing up: University of Thai Nguyen, Vietnam, 13. November 2011

 

143. Projective surfaces of maximal sectional regularity: International Conference on Algebra and Topology, November 3 - November 5, 2011, University of Thai Nguyen (in Honor of the 60th Birthday of N.T.Cuong), Thai Nguyen / Vietnam, 4. November 2011

 

142. Projective varieties of low degree: Arbeitsgemeinschaft Algebra und Geometry,   Universität Basel, University of Basel/Switzerland, 29. October 2010

 

141. Visualisierung von Aufblasungen: Oberseminar am Institut für Informatik der Universität Halle, Halle (Saale)/Germany, 4. December 2009

 

140. What does bound cohomology? HUFS Mini Workshop in Algebraic Geometry, Hankuk University of Foreign Studies, Seoul/Korea, 30. July 2009

 

139. Castelnuovo-Mumford regularity of deficiency modules: HUFS Mini Workshop in Algebraic Geometry, Hankuk University of Foreign Studies, Seoul/Korea, 30. July 2009

 

138. Projective varieties of low degree: Forschungsseminar Algebraische Geometrie, Humboldt-Universität Berlin/Germany, 7.Juli 2009

 

137. Secant loci of rational normal scrolls and varieties of almost minimal degree: 4th World Conference on 21st Century Mathematics 2009, March 4-8, 2009, Abdus Salam School of Mathematical Sciencies, GC University, Lahore/Pakistan, 6. March 2009

 

136. Projections of rational normal scrolls II (projections and classification, varieties of almost minimal degree, curves and surfaces of degree = codimension + 3): Workshop on Projective and Computational Algebraic Geometry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon/Korea, February 12-14, 2008, 14. February 2008

 

135. Projections of rational normal scrolls I (structure of scrolls, lines and conics on srolls, secant loci, tangent spaces, the secant stratification, non-normal del Pezzo varieties): Workshop on Projective and Computational Algebraic Geometry,Korea Advanced Institute of Science and Technology (KAIST), Daejeon/Korea, February 12-14, 2008, 12. February 2008

 

134. Cohomological stability of projective schemes over surfaces; Algebra Seminar, University of Sheffield/England, 17. January 2008

 

133. Supporting degrees of multi-graded local cohomology modules: The 3rd Japan-Vietnam Joint Seminar on Commutative Algebra, Institute of Mathematics/Vietnamese Academy of Science and Technology, Hanoi/Vietnam, December 3-7, 2007, 4. December 2007

 

132. The asymptotic behaviour of local cohomology: University of Thai Ngyuen/Vietnam, 30. November 2007

 

131. Bounding cohomology of projective schemes: Workshop on Castelnuovo-Mumford Regularity and Applications, Max Planck Institute for Mathematics in the Sciences/University of Leipzig/Germany, 15.&16. June 2007, 15. June 2007

 

130. Asymptotic behaviour of cohomology of proper schemes: Arbeitsgemeinschaft Algebra und Topologie, University of Basel/Switzerland, 11. May 2007

 

129. Cohomological stability of projective schemes: University of Leipzig/Germany, 15. February 2007

 

128. Bounds for the Castelnuovo-Mumford regularity: Arbeitsgemeinschaft Algebra und Toplogie, University of Basel/Switzerland, 8. December 2006

 

127. Arithmetic properties of projective varieties of almost minimal degree: Korea Instiute for Advanced Study (KIAS), Seoul/Korea, 17. August 2006

 

126. A cohomological stability result for projective schemes over surfaces: Conference on Commutative Algebra and its Interactions with Algebraic Geometry, CIRM Luminy/France, 22.- 26. May 2006, 22. May 2006

 

125. An upper bound for the Castelnuovo-Mumford regularity: Conference on Castelnuovo-Mumford Regularity and Related Topics, CIRM Luminy/France, 9.- 12. May 2006, 9. May 2006

 

124. Bounds for the Castelnuovo-Mumford regularity: CIMPA International Conference on Commutative Algebra, Institute of Mathematics Hanoi/Vietnam, 3.-6. January 2006, 3. January 2006

 

123. Blowing-up and its visualization: St. Joseph's College Irinjalkuda, Kerala/India, 27. July 2005

 

122. Rational points on plane curves: St. Joseph's College Irinjalakuda, Kerala/India, 26. July 2005

 

121. Asymptotic behaviour of Cohomology: Workshop an Commutative Algebra and Algebraic Geometry, St. Joseph's College, Irinjalakuda, 18.-23. July 2005, Irinjalakuda, Kerala/India, 22. July 2005

 

120. Projective varieties of almost minimal degree: Summer School in Commutative Algebra: Local Cohomology and its Application, 19.-30. June 2005, Snowbird, Utah/ USA, 29. June 2005

 

119. Bounds for the Castelnuovo-Mumford regularity of graded modules: Oberseminar at the University of Essen, Essen/Germany, 2. November 2004

 

118. On the asymptotic behavior of cohomology: School on Commutative Algebra and Interactions with Algebraic Geometry and Combinatorics, 7.-11. June 2004, International Center of Theoretical Physics, Trieste/Italy, 11. June 2004

 

117. Castelnuovo-Mumford regularity and degrees of generators: Algebra Seminar, University of Sheffield, Sheffield/England, 17. February 2004

 

116. Asymptotic behaviour of graded local cohomology: Algebra Seminar, University of Sheffield, Sheffield/England, 10.February 2004

 

115. Associated primes and numerical invariants of graded local cohomology modules: Joint INDIA-AMS Mathematics Meeting, Special Session in Commutative Algebra and Algebraic Geometry, 17.-20. December 2003, Tata Auditorium, Indian Institute of Science, Bangalore/India, 17. December 2003

 

114. Syzygies, degrees of generators and Castelnuovo-Mumford regularity from Hentzelt-Hermann to Bayer-Mumford and beyond: Seminar, Tata Institute of Fundamental Research, Bombay/India, 20. November 2002

 

113. Blowing-Up of surfaces and their visualization: Mathematics Association of the Indian Institute of Technology and the Bombay Mathematical Colloquium, Indian Institute of Technology, Bombay/India, 15. November 2002

 

112. Local cohomology-algebraic and geometric aspects: Colloquium at the Indian Institute of Technology, Bombay/India, 15. November 2002

 

111. Asymptotic behaviour of graded components of local cohomology modules: Colloquium at the Tata Institute of Fundamental Research, Bombay/India, 14. November 2002

 

110. Graded components of local cohomology modules-a survey: International Conference on Algebraic Geometry, Commutative Algebra and Topology, Mamaia/Romania, 22.-26. September 2002

 

109. Bounding sheaf cohomology by the diagonal: Colloquium at the University of Sheffield, Sheffield/England, 12. November 2001

 

108. Curves of degree r+2 in projective r-space: Colloquium at the Tata Institute of Fundamental Research, Bombay/India, 19. December 2000

 

107. Bounding sheaf cohomology by the diagonal: International Conference on Cohomological Methods in Commutative Algebra, Bombay/India, 14.-16. December 2000

 

106. A-Priori-Schranken fuer die Kohomologie projektiver Schemata: Oberseminar Algebraische Geometrie der Universität Essen/Germany, 5. December 2000

 

105. Associated primes of local cohomology modules: Colloquium at the University of Sheffield, Sheffield/England, 16. February 2000

 

104. Diagonal bounds for cohomological Hilbert functions and cohomological patterns for projective schemes over Artinian rings: Conference on Local Cohomology, CIMAT, Guanajuato/Mexico, 11. November - 3. December 1999

 

103. Loca-global principles for local cohomology modules: Colloquium at the Institute of Mathematics Hanoi/Vietnam, 22. September 1999

 

102. Prime divisors: from elementary arithmetics to local cohomology: Colloquium at the University of Quy Nhon/Vietnam, 15. September 1999

 

101. Around arithmetization of shape - bounding cohomology: Colloquium at the University of Quy Nhon/Vietnam, 17. September 1999

 

100. Aufblasung affiner Varietäten und ihre Veranschaulichung mit dem Computer:Colloquium at the University of Paderborn/Germany, 15. December 1998

 

99. A real glance at Rees rings: Conference on Commutative Algebra in Honour of David Rees' 80th Year, University of Exeter/England, 13.-16. August 1998

 

98. Projektive Kurven und Flächen von kleinem Grad: Colloquium at the University of Ulm/Germany, 19. May 1998

 

97. A vanishing result for ample line bundles and some applications to surfaces of low degree: Conference on Low Dimensional Varieties in Positive Characteristic, Amsterdam/Netherlands, 24.-28. November 1997

 

96. Projective curves and surfaces of low degree: Conference of the Vietnamese Mathematical Society, Hanoi/Vietnam, 17. September 1997

 

95. Blowing-up of algebraic varieties: Colloquium at the University of Quy Nhon/Vietnam, 10. September 1997, Colloquium at the Univesity of Hue/Vietnam, 13. September 1997

 

94. Cohomology of line bundles in positive characteristics and application to projective surfaces: Seminar at the Institute of Mathematics, Hanoi/Vietnam, 4. September 1997

 

93. Ueber K-3 Flächen von minimalem Grad: Oberseminar at the University of Leipzig/Germany 30. July 1997

 

92. Cohomology of ample line bundles in positive characteristics: Giornate di Algebra Commutativa e Geometria Algebrica in honore di M. Fiorentini, University of Ferrara/Italy, 16.-19. June 1997

 

91. Cohomology of line bundles and Serre duality on toric varieties: Borel-Seminar, University of Berne/Switzerland, 14. May 1997

 

90. An algebraic generalization of the vanishing theorem of Severi-Enriques-Zariski-Serre: International Conference on Algebraic Geometry, Commutative Algebra and Computer Algebra, Constantza/Romania, 24.-30. September 1996

 

89. Vanishing bounds for the first cohomology of an ample divisor over a normal variety in positive characteristics: International Conference on Commutative Algebra and Algebraic Geometry, Hanoi/Vietnam, 19.-23. August 1996

 

88. Computer-Bilder von Aufblasungen: Colloquium at the University of Innsbruck/Austria, 5. June 1996

 

87. A survey on local cohomology and connectivity in algebraic varieties: Colloquium at the University of Sheffield, Sheffield/England, 13. February 1996

 

86. Zur Kohomologie projektiver Flächen in positiver Charakteristik: Seminar an der Arbeitsgruppe Zahlentheorie und Algebraische Geometrie, Humboldt-Universität Berlin/Germany, 1. March 1995

 

85. A few remarks on "Macaulayfication" of sheaves: International Conference on Commutative Algebra, Vechta/Germany, July 27-August 1, 1994, 28. July 1994

 

84. Blowing-ups and their visualization by computer: Colloquium at the University of Sheffield/England, 9. March 1994

 

83. Bounding cohomology of projective varieties: University of Cambridge/England, 12. March 1993

 

82. Bounds for the cohomology of projective varieties: University of Sheffield/England, 10. March 1993

 

81. About the cohomology of certain projective surfaces: Michigan State University at East Lansing/USA, 16. July 1992

 

80. Bounds of Severi type for graded local cohomology: Joint Summer Research Conference on Commutative Algebra: Syzygies, Multiplicities and Birational Algebra, July 5-9, 1992, Mt.Holyoke College, South Hadley, Mass./USA, 8. July 1992

 

79. Sur la régularité de Castelnuovo de certaines surfaces projectives: Colloque à l'Université Louis Pasteur à Strasbourg/France, 15. April 1992

 

78. Über 2-B-Flächen vom Schnittgeschlecht 0: Westfälische Wilhelmsuniversität Münster/Germany, 18. December 1991

 

77. Über 2-B-Flächen vom Schnittgeschlecht 0: Martin-Luther-Universität Halle-Wittenberg, Halle (Saale)/Germany, 16. December 1991

 

76. Typical bundles of B-modules: Conference on Commutative Algebra, Algebraic Geometry and their Interaction with Computer Algebra, Eisenach/Germany, June 1991, 6.June 1991

 

75. Typische Bündel isoliert singulärer Garben: Westfälische Wilhelms-Universität Münster, 13. Dezember 1990

 

74. Bemerkungen zur Kohomologie projektiver Varietäten: Universität zu Köln/Germany, 12. December 1990

 

73. La disctrétisation du continue en géométrie algébrique: CERFIM Locarno/Switzerland, 9. November 1990

 

72. A-priori-Schranken vom Castelnuovo- und Severi-Typ für die Kohomologie kohärenter Garben: Martin-Luther-Universität Halle-Wittenberg, Halle (Saale)/Germany, 23. October 1990

 

71. A-priori-Schranken für die Kohomologie projektiver Varietäten: Jahrestagung der Deutschen Mathematiker-Vereinigung, Bremen/Germany, 18. September 1990

 

70. Bounding cohomology of projective varieties: International Congress of Mathematicians, Kyoto/Japan, 27. August 1990

 

69. Algorithms for bounding cohomology of projective varieties:  ICM-90 Satellite Conference on Commutative Algebra and Combinatorics, Nagoya University, Nagoya/Japan, 16. August 1990

 

68. Schranken für die Kohomologie projektiver Varietäten: Mathematisches Kolloquium der Universität Zürich/Switzerland, 10. May 1990

 

67. A-priori bounds of Castelnuovo type for cohomological Hilbert functions: International Conference on Projective Varieties, Trieste/Italy, 22. June 1989

 

66. Die Mayer-Vietoris-Sequenz in der lokalen Kohomologietheorie: Jahrestagung der Deutschen Mathematiker-Vereinigung, Regensburg/Germany, 20. September 1988

 

 65. Cohomology of certain blowing-up: Seminar über Algebra und Topologie an der ETH Zürich/Switzerland, 11. November 1988

 

64. Einige Resultate aus der Kohomologietheorie projektiver Varietäten: Mathematisches Kolloquium an der Westfälischen Wilhelms-Universität Münster/Germany, 14. December 1988

 

63. Connectivité en géométrie algébrique: Université de Lausanne/Switzerland, 16. March 1988

 

62. A lemma of Linear Algebra and its application to cohomology of algebraic varieties: Universität Darmstadt/Germany, 6. February 1988

 

61. Die Mayer-Vietoris-Sequenz in der lokalen Kohomologietheorie: Seminar über Algebra und Topologie an der ETH Zürich/Switzerland, 30. November 1987

 

60. Asymptotic depth and connectedness of fibers: Conference on Commutative Algebra and Algebraic Geometry, Mathematisches Forschungsinstitut Oberwolfach/Germany, 26. May 1987

 

59. Hyperplane sections and cohomology of projective varieties: Politecnico die Torino/Italy, 20. October 1987

 

58. The hyperplane section method in cohomology of projective varieties: University of Edinburgh/Scottland, 16. September 1987

 

57. Bounds for the cohomology of projective varieties: Conference on Commutative Algebra and Algebraic Geometry, Mathematisches Forschungsinstitut Oberwolfach/Germany, 13. May 1986

 

56. Kohomologische Hilbert-Funktionen: Seminar über Algebra und Topologie, UNI/ETH Zürich, 20. January 1985

 

55. Schranken für die Serre-Kohomologie projektiver Varietäten: Einführungsvortrag an der Jahrestagung der Schweizerischen Mathematischen Gesellschaft, Zürich/Switzerland,  6. October 1984

 

54.  Bounds for the cohomology of a coherent sheaf over a projective space: International Conference on Commutative Algebra and Algebraic Geometry, Krupina-Bratislava/Cechoslovakia, 21. June 1984

 

53. Connectedness of Blowing-up and tangent cones: University of Groningen/Netherlands, 20. March 1984

 

52. Raumkurven als Durchschnitte von Flächen: Habilitationsvortrag, Universität Zürich/Switzerland, 9. June 1983

 

51. Connectedness via local cohomology: Conference on Commutative Algebra and Algebraic Geometry, Mathematisches Forschungsinstitut Oberwolfach/Germany,  May 1983

 

50. Zur Kohomologie Projektiver Varitäten: Universität Göttingen/Germany, 4. November 1982

 

49. Standard-Aufblasungen: Jahrestagung der Deutschen Mathematiker-Vereinigung, Bayreuth/Germany 1982, Fall 1982

 

48. Über Cohen-Macaulay-Punkte: Bewerbungsvortrag, Universität Zürich/Switzerland, 29. June 1982

 

47. Über Aufblasungen: Universität Eichstätt/Germany, 22. June 1982

 

46. Ein Hochhebungsprinzip für lakale Kohomologiemoduln: Tagung über Kommutaive Algebra, Universität Paderborn/Germany, 8. June 1982

 

45. A lifting result for local cohomology: Conference on Commutative Algebra and Algebraic Geometry, Mathematisches Forschungsinstitut Oberwolfach/Germany, May 1982

 

44. Éclatements: Université de Lausanne/Switzerland, 18. January 1982

 

43. Über birationale Modelle: Westfälische Wilhelms-Universität Münster/Germany, December 1981

 

42. Probleme der Kommutativen Algebra: Algebra-Tagung der Schweizerischen Mathematischen Gesellschaft, Zürich/Switzerland, 4. December 1981

 

41. Über birationale Modelle: Universität Essen/Germany, November 1981

 

40. Lokale Eigenschaften des Blow-up Prozesses: Algebra-Seminar am Forschungsinstitut für Mathematik der ETH Zürich/Switzerland, 7. November 1981

 

39. Folgen und Reihen: Höhere Technische Lehranstalt Soloturn-Grenchen/Switzerland, 4. September 1981

 

38. Chains of primes, end of a theory? International Conference on Commutative Algebra and Algebraic Geometry, Krupina-Bratislava/Cechoslovakia, Fall 1981

 

37. Primidealketten: Mathematisches Kolloquium der Universität Basel/Switzerland, 29. June 1981

 

36. Some results on blow-up and conormal cones: International Conference on Commutative Algebra, Trento/Italy, June 1981

 

35. Kohomologie von Aufblasungen: Mathematisches Kolloquium der Universität Basel/Switzerland, 7. February 1981

 

34. Zum Jacobi-Problem: Algebra-Seminar der Universität Zürich/Switzerland, 1. February 1981

 

33. Sur les anneaux de Rees: Université de Genève/Switzerland, 27. December 1980

 

32. Anneaux gradués et éclatés symboliques: Université de Genève/Switzerland, 14. December 1980

 

31. Finitude des Z-clôtures: Université de Genève/Switzerland, 7. December 1980

 

30. Die Tiefe der höheren Konormalenbündel: Algebra-Seminar am Forschungsinstitut für Mathematik der ETH Zürich/Switzerland, October 1980

 

29. Über den Konormalenkegel algebraischer Varietäten: Algebra-Seminar am Forschungsinstitut für Mathematik der ETH Zürich/Switzerland, October 1980

 

28. Über Aufblasungen und Konormalenkegel: Mathematisches Kolloquium an der Westfälischen Wilhelms-Universität Münster/Germany, 1. October 1980

 

27. Wangs Beweis zum quadratischen Fall des Jacobi-Problems: Habilitationsvortrag an der Westfälischen Wilhelms-Universität Münster/Germany, 25. June 1980

 

26. Standard-Aufblasungen I/II: Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany, 7./14. February 1980

 

 25. Über eine Macaulayfizierung gewisser algebraischer Varietäten: Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany,  December 1979

 

24. Über lokal fastvollständige Durchschnitte: Universität Bonn/Germany, 23. October 1979

 

23. Zu den Resultaten von Goto und Shimoda: Martin-Luther-Universität Halle-Wittenberg, Halle (Saale)/Germany, 29. June 1979

 

22. Lokale Kohomologie von Rees-Ringen: Karl-Marx-Universität Leipzig/Germany, 28. June 1979

 

21. Aufblasung und Konormalenkegel fastvollständiger Durchschnitte: Martin-Luther-Universität Halle Wittenberg, Halle (Saale)/ Germany, 22. June 1979

 

20. Arithmetic depth of blowing up: Conference on Commutative Algebra and Algebraic Geometry, Mathematisches Forschungsinstitut Oberwolfach/Germany, May 1979

 

19. Lokale Struktur von Aufblasungen und Konormalenkegeln: Jahrestagung der Schweizerischen Mathematischen Gesellschaft, Lausanne, Spring 1979

 

18. Konormalenkegel von fastvollständigen Durchschnitten: Universität Essen/Germany, 2. February 1979

 

17. Über Varietäten, deren Ideal durch wenige Polynome erzeugt ist: Universität Basel/Switzerland, 26. January 1979

 

16. Primbasen und fastvollständige Durchschnitte: Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany, 18. January 1979

 

15. Zur Bedeutung und Transitivität der normalen Flachheit: Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany, Summer 1978

 

14. A Cohen-Macaulay criterion by J. Herzog: Fellowship of the Ring Seminar, Brandeis University, Waltham, Mass./USA, 22. June 1978

 

13. Derivations loci and formal fibres in Noetherian rings: Seminar on Algebraic Geometry, Brandeis University, Waltham, Mas./USA, 8. May 1978

 

12. Blow up and locally complete intersections (after Cowsik and Nori): Fellowship of the Ring Seminar, Brandeis University, Waltham, Mass./USA, April 1978

 

11. Depth-increasing morphisms: Fellowship of the Ring Seminar, Brandeis University, Waltham, Mass./USA, 2. February 1978

 

10. Finiteness of local cohomology modules and applications: Fellowship of the Ring Seminar, Brandeis University, Waltham, Mass./USA, 16. February 1978

 

9. On Ass(M/I^nM), n large: Fellowship of the Ring Seminar, Brandeis University, Waltham, Mass./USA, 14. December 1977

 

8. Chains of primes in comutative rings: Every Person's Seminar, Brandeis University, Waltham, Mass./USA, November 1977

 

7. Ungemischte Ringe und ihre "Macaulayfizierung": Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany, April 1977

 

 6. Primidealketten in Noetherschen Ringen: Oberseminar Algebraische Geometrie der Westfälischen Wilhelms-Universität Münster/Germany, April 1977

 

5. Une Macaulayfication de certains anneaux locaux: Journées d'algèbre commutative, Université de Rennes/France, 21. May 1976

 

4. A Macaulayfication of unmixed domains: Istituto di Analisi Matematica del, Universita di Torino/Italy, 30. Mars 1976

 

3. A Macaulayfication of local domains: Conference on Rings, Modules, Homology, May 11-17, 1975, Mathematisches Forschungsinstitut Oberwolfach/Germany, 13. May 1975

 

2. Dimension des associés du complété d'un anneau integre et local: Colloque de présentation à l' EPFL Lausanne/Switzerland,  Summer 1974

 

1. Die lokalen Ringe und ihre Kompletion: Dissertationskolloquium an der Universität Basel/Switzerland, 1. March 1974