INDECOMPOSABLE REPRESENTATIONS AND THE LOOP-SPACE OPERATION'
INDECOMPOSABLE REPRESENTATIONS AND THE LOOP-SPACE OPERATION'
复制标题
不可分解的表示和循环空间操作
DOI:
10.1090/s0002-9939-1961-0126480-2
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发表时间:
1961
期刊:
影响因子:
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通讯作者:
A. Heller
中科院分区:
文献类型:
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作者:
A. Heller
1. The loop-space operation. We denote by A a finite dimensional algebra with unit 1 over a field K. By "module" we shall always mean a finitely generated left A-module on which 1 operates as the identity. We shall say that A is weak-Frobenius if the classes of injective and projective A-modules coincide. Quasi-Frobenius algebras, Frobenius algebras, symmetric algebras and in particular group algebras of finite groups are all weak-Frobenius. For any module A we denote by [A] the isomorphism class of A.