Volume no :36, Issue no: 1, November

SCHUR RING AND REDUCIBILITY MODULO p

Author's: Pedro Manuel Dominguez Wade
Pages: [29] - [46]
Received Date: October 29, 2015
Submitted by:
DOI: http://dx.doi.org/10.18642/jmsaa_7100121566

Abstract

Let R be a ring of algebraic integers of an algebraic number field F and let be a finite group. In [11] was proved that the R-span of G is just the matrix ring of the over R if and only if the Brauer reduction of modulo every prime is absolutely irreducible. In this paper, we show that if and only if the Brauer reduction of modulo a finite number of primes is absolutely irreducible. Moreover, we give conditions for n, under which is a Schur ring.

Keywords

Schur ring, G-weight, reduction modulo p, reduction modulo