November 22, 2021
The Session will consist of three parts:
• A general semicontinuity theorem for families of modules defined by power series.
• Proof that the delta invariant in a family of parameterizations of reduced curve singularities is upper semicontinuous.
• A new algorithm for standard basis computations of 0-dimensional ideals in a power series ring that provides a significant speed up when coefficient swell occurs.
Date: Monday, November 22, 2021
Time: 4:00 pm – 5:00 pm
You can access the talk on the following zoom link:
[Meeting ID: 973 7985 5766; Passcode: 146928]
About the Speaker
Prof. Gert-Martin Greuel received the PhD degree from the University of Goettingen, Germany, in 1973 and the Habilitation degree from the University of Bonn, Germany, in 1980. Since 1981, he has been a Full Professor at the University of Kaiserslautern, Germany. In 1992, he became Director of the Centre for Computer Algebra at the University of Kaiserslautern. Since 2002, he has also been a Director of the Mathematisches Forschungsinstitut Oberwolfach. His research interests include singularity theory, algebraic geometry, computer algebra, and its applications. He is one of the authors of the free computer algebra system SINGULAR.