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arXiv 1105.2895math.RAmath.NT
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域嵌入单代数的推广及应用

Embeddings of fields into simple algebras: generalizations and applications

Chia-Fu Yu

摘要:

对于任意基域$F$上的两个半单代数代数$A$和$B$,给出了它们之间的$F$ -代数同态集$\Hom_F(A,B)$非空的一个数值判据.我们还确定了轨道集$B^\times \backslash \Hom_\falg(A,B)$何时是有限的,并给出了其基数的显式公式。给出了主要结果的几个应用。

英文摘要:

For two semi-simple algebras $A$ and $B$ over an arbitrary ground field $F$, we give a numerical criterion when $\Hom_F(A,B)$, the set of $F$-algebra homomorphisms between them, is non-empty. We also determine when the orbit set $B^\times \backslash \Hom_\falg(A,B)$ is finite and give an explicit formula for its cardinality. A few applications of main results are given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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