Abstract
Kaplansky asked about the possible images of a polynomial f in several noncommuting variables. In this paper, we consider the case of f a Lie polynomial. We describe all the possible images of f in M2(K) and provide an example of f whose image is the set of non-nilpotent trace zero matrices, together with 0. We provide an arithmetic criterion for this case. We also show that the standard polynomial sk is not a Lie polynomial, for k>2.
| Original language | English |
|---|---|
| Pages (from-to) | 4801-4808 |
| Number of pages | 8 |
| Journal | Communications in Algebra |
| Volume | 45 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2 Nov 2017 |
| Externally published | Yes |
Keywords
- Lie polynomials
- matrices