| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4587732 | Journal of Algebra | 2008 | 7 Pages |
Abstract
Let A2 be a free associative or polynomial algebra of rank two over a field K of characteristic zero. Based on the degree estimate of Makar-Limanov and J.-T. Yu, we prove: (1) An element p∈A2 is a test element if p does not belong to any proper retract of A2; (2) Every endomorphism preserving the automorphic orbit of a nonconstant element of A2 is an automorphism.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
