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arXiv math/0511691math.RAmath.AT
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Cayley-Dickson代数中的大零化子

Large annihilators in Cayley-Dickson algebras

Daniel K. Biss, Daniel Dugger, Daniel C. Isaksen

摘要:

Cayley-Dickson代数是从实数、复数、四元数和八元数开始的非结合代数的无穷序列。研究了高阶Cayley-Dickson代数中的零因子。特别地,我们证明了2^n维Cayley-Dickson代数中任意元素的零化子的维数至多为2 ^n-4 n +4.此外,在0和这个上界之间的每一个4的倍数实际上都是某个零化子的维数(莫雷诺的一个定理说,只有4的倍数才能出现)。我们完整地描述了零化子维数为2^n-4 n +4的所有零因子。

英文摘要:

Cayley-Dickson algebras are an infinite sequence of non-associative algebras starting with the reals, complexes, quaternions, and octonions. We study the zero-divisors in the higher Cayley-Dickson algebras. In particular, we show that the annihilator of any element in the 2^n-dimensional Cayley-Dickson algebra has dimension at most 2^n-4n+4. Moroever, every multiple of four between 0 and this upper bound actually occurs as the dimension of some annihilator (a theorem of Moreno says that only multiples of four can occur). We completely describe all the zero-divisors whose annihilator has dimension 2^n-4n+4.

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