We introduce Morita and Rickard equivalences over a group graded G-algebra between block extensions. A consequence of such equivalences is that Spath's central order relation holds between two corresponding character triples.

中文翻译：

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一组分级 G 代数的字符三元组和等价

我们在块扩展之间的一组分级 G 代数上引入 Morita 和 Rickard 等价。这种等价的结果是 Spath 的中心顺序关系在两个对应的字符三元组之间成立。