Degree estimate for subalgebras
نویسندگان
چکیده
منابع مشابه
Applications of Degree Estimate for Subalgebras
Let K be a field of positive characteristic and K〈x, y〉 be the free algebra of rank two over K. Based on the degree estimate done by Y.-C. Li and J.-T. Yu, we extend the results of S.J. Gong and J.T. Yu’s results: (1) An element p(x, y) ∈ K〈x, y〉 is a test element if and only if p(x, y) does not belong to any proper retract of K〈x, y〉; (2) Every endomorphism preserving the automorphic orbit of ...
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 2012
ISSN: 0021-8693
DOI: 10.1016/j.jalgebra.2012.03.024