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Seminars

Colloquium

Introduction to total positivity.

2025/10/31 (Fri.) 15:30~16:30
  • Date : 2025/10/31 (Fri.) 15:30~16:30
  • Location : Auditorium, 6 Floor, Institute of Mathematics (NTU Campus)
  • Speaker : George Lusztig (MIT)
  • Abstract : Totally positive matrices are n times n matrices with real entries such that any minor is $>0$. They were introduced by Schoenberg and Krein-Gantmacher in the 1930's. They form an open semigroup in $GL_n(R)$. I will talk about the extension of this theory to other Lie groups.
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