On the free arrangements and truncated affine Weyl arrangements
Masahiko Yoshinaga (吉永正彦)
Department of Mathematics, Kyoto University, Kyoto, Japan.
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.