Author: Oleg Balashov 

Title: Yoneda Algebras of Dihedral Type Algebras

Ref: PhD thesis, St.Petersburg State University, 2000 (in Russian)

Abstract: A method of computing Yoneda algebras of algebras of dihedral =
type is developed. The results are applied to finding Ext-algebras of =
simple modules over algebras of dihedral type. In particular, the =
cohomology rings of finite groups with dihedral Sylov 2-subgroup are =
described. This includes the series PSL(2,q) (q odd), as well as known =
results for alternating groups (see Corollary 1.1.8 on p. 23).