FIXED ELEMENTS OF NONINJECTIVE ENDOMORPHISMS OF POLYNOMIAL ALGEBRAS IN TWO VARIABLES

FIXED ELEMENTS OF NONINJECTIVE ENDOMORPHISMS OF POLYNOMIAL ALGEBRAS IN TWO VARIABLES
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二变量多项式代数非内射自同态的固定元素

DOI:
10.1017/s0004972716000630
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发表时间:
2016-10
影响因子:
0.7
通讯作者:
Yu Jie-Tai
Yu Jie-Tai
中科院分区:
数学4区
文献类型:
--
作者:
Li Yueyue;Yu Jie-Tai

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设A2是特征为零的域上秩为2的自由结合代数或多项式代数。本文的主要结果是A_{2}$的非内射自同态的分类和判定A_{2}$的非内射自同态对于多项式代数是否有非平凡不动元的算法。秩为2的自由结合代数的算法是有效的,只要给定一个元素,并且由该元素生成的子代数包含给定的非内射自同态的像。
Let $A_{2}$ be a free associative algebra or polynomial algebra of rank two over a field of characteristic zero. The main results of this paper are the classification of noninjective endomorphisms of $A_{2}$ and an algorithm to determine whether a given noninjective endomorphism of $A_{2}$ has a nontrivial fixed element for a polynomial algebra. The algorithm for a free associative algebra of rank two is valid whenever an element is given and the subalgebra generated by this element contains the image of the given noninjective endomorphism.
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