We characterize the blocks of finite group algebras with the property that the radical of their center is an ideal in the block. We also consider related properties of blocks of symmetric algebras and of group algebras.

中文翻译：

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群代数和块的中心和根

我们刻画了有限群代数块的性质，即它们中心的根是块中的理想。我们还考虑了对称代数块和群代数块的相关性质。