Journal of the Korean Mathematical Society vol. 39, no. 1, pp. 1 - 11
Indexed
SCIE; SCOPUS; KCI
Document Type
Article
Abstract
A Schur algebra was generalized to projective Schur algebra by admitting twisted group algebra. A Schur algebra is a projective Schur algebra with trivial 2-cocycle. In this paper we study situations that Schur algebra is a projective Schur algebra with nontrivial cocycle, and we find a criterion for a projective Schur algebra to be a Schur algebra.