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arXiv 1104.4752math.RA
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自由结合代数的极大T-空间

Maximal T-spaces of a free associative algebra

Chuluun Bekh-Ochir, Stuart Rankin

摘要:

研究了非空集上自由结合k-代数的T-空间格。它表明,当字段k是无限的,那么格有一个最大的元素,最大的元素实际上是一个T理想。与此形成鲜明对比的是,证明了当域k是有限的时,T-空间的格有无穷多个极大元(其中正好有两个是T-理想)。对于自由酉结合k-代数也得到了类似的结果。证明是基于这样的观察:在非空集X上的自由结合$k$ -代数的极大T-空间的集合与在单点集上的极大T-空间的集合之间存在自然双射。这使得研究单元素集上的自由结合k-代数的T-空间格的结果转移到一般情况。

英文摘要:

We study the lattice of T-spaces of a free associative k-algebra over a nonempty set. It is shown that when the field k is infinite, then the lattice has a maximum element, and that maximum element is in fact a T-ideal. In striking contrast, it is then proven that when the field k is finite, the lattice of T-spaces has infinitely many maximal elements (of which exactly two are T-ideals). Similar results are also obtained for the free unitary associative k-algebras. The proof is based on the observation that there is a natural bijection between the sets of maximal T-spaces of the free associative $k$-algebras over a nonempty set X and over a singleton set. This permits the transfer of results from the study of the lattice of T-spaces of the free associative k-algebra over a one-element set to the general case.

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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