Masahiko Yoshinaga (吉永正彦), On the Free Arrangements and Truncated Affine Weyl Arrangements

On the free arrangements and truncated affine Weyl arrangements
Masahiko Yoshinaga (吉永正彦)
Department of Mathematics, Kyoto University, Kyoto, Japan.
2010/10/26 Tue 4PM-5PM (Room 3433)

Freeness of a hyperplane arrangement is defined algebraically using module of derivations. I will discuss freeness of certain truncated affine Weyl arrangements, called the extended Catalan/Shi arrangements. I will also talk some enumerative corollaries.

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