Knörr has constructed an ideal, in the center of the p-modular group algebra of a finite group G, whose dimension is the number of p-blocks of defect zero in G/Q; here p is a prime and Q is a normal p-subgroup of G. We generalize his construction to symmetric algebras.

中文翻译：

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关于克诺尔定理

Knörr 在有限群G的p模群代数的中心构造了一个理想，其维数是G / Q中缺陷零的p块的数量；这里p是素数，Q是G的正规p子群。我们将他的构造推广到对称代数。