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JOURNALS // Fundamentalnaya i Prikladnaya Matematika // Archive
Fundam. Prikl. Mat., 2002 Volume 8, Issue 3, Pages 721–727 (Mi fpm672)
On graded rings and varieties

A. V. Kelarev

University of Tasmania

Abstract: For any semigroup $S$, we completely describe all varieties closed for taking $S$-graded rings. Also, we describe all varieties closed for sums of two rings.

UDC: 512.55

Received: 01.05.1998



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