2週內演講

Analysis Seminar, 北海道大學理學院 中村玄教授 Wednesday, November 21, 10:10—13:00 數學系3樓會議室 Title: Introduction to Inverse Problems (1)(2)

Colloquium, 清華大學數學系 吳浩平博士 Thursday, November 22, 15:10—16:00 數學系3174 Title: Introduction to Equivariant Degree Theory Abstract:The equivariant degree is a topological tool which allows of “counting” orbits of solutions to (symmetric) equations in the same way the Brouwer degree does, but according to their symmetric properties. In this talk, I will give an overview on Equivariant Degree Theory (EDT), which includes the following topics: Brouwer degree, axiomatic approach, group symmetry, Burnside ring and computation of equivariant degree; all of them will be supported by simple examples. After the overview, I will illustrate how one can apply EDT by considering a boundary value problem with symmetry.

Colloquium, 南非自由省大學 Johan H Meyer教授 Thursday, November 22, 16:10—17:00 數學系3174 Title: Unique Maximal Rings of Functions Abstract:For several classes of groups G we characterize when the near-ring M_0(G) of 0-preserving selfmaps on G contains a unique maximal ring. Definitive results are obtained for finite abelian, finite nilpotent, and finite permutation groups.

Analysis Seminar, 北海道大學理學院 中村玄教授 Wednesday, November 28, 10:10—13:00 數學系3樓會議室 Title: Forward Problems for Inverse Scattering, Boundary Problems and Some Analytic Tools (1)(2)