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06/2003 Workshop "Computing in Algebra and Geometry"
(Universität Kaiserslautern)
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01/2003 Winter School on Computational Algebraic Geometry
(Harish-Chandra Research Institute, Allahabad, India) -- joint with Wolfram Decker:
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07/2002 7th Workshop on Real and Complex
Singularities (ICMC-USP, Sao Carlos, Brazil):
"SINGULAR
as a tool for Singularity Theory" (Mini-Course)
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04/2002: Habilitationsvortrag (Kaiserslautern):
"Polynominterpolation und Nagata's Vermutung"
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06/2001: DFG-Schwerpunkttagung (Marburg):
"Castelnuovo function, zero-dimensional schemes and singular
plane curves"
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03/2001: Real & Complex Geometry Seminar; Tel Aviv University (Israel):
"Geometry of Equisingular Families of Curves on Algebraic Surfaces"
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08/2000 New Developments in Singularity Theory (Cambridge):
"The
Geometry of Families of Singular Curves" (2 lectures)
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05/2000 Aspectos Computacionales en Algebra Conmutativa y
Geometria Algebraica (Valladolid):
" A demonstration of
SINGULAR, a Computer System for Polynomial Computations"
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05/1999: Singularitäten (Oberwolfach):
"Castelnuovo function, zero-dimensional schemes and singular
plane curves"
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09/1997: Singularities (Valladolid):
"On the existence of plane curves with prescribed singularities"
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07/1996: Singularitäten (Oberwolfach):
"Geometry of families of nodal curves on the blown-up
projective plane"
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03/1996: Algebraic Geometry seminar; Bar Ilan University (Israel):
"The isomorphism defect of torsion-free sheaves and its application to
equisingular families of curves"
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01/1996: Algorithmische algebraische Geometrie und
Singularitätentheorie (Dagstuhl):
"Nicht-Obstruiertheit äquisingulärer Familien von Kurven
auf Flächen"
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09/1995: DMV-Jahrestagung (Ulm):
"Äquisinguläre Familien von Kurven auf Flächen"
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06/1995: DFG-Schwerpunkttagung (Dagstuhl):
"Nicht-Obstruiertheit und lokaler Isomorphiedefekt von
äquisingulären Familien von Kurven auf Flächen"
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