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Certain functional identities on division rings
- Source :
- J. Algebra 647 (2024) 492-514
- Publication Year :
- 2024
-
Abstract
- We study the functional identity $G(x)f(x)=H(x)$ on a division ring $D$, where $f \colon D\to D$ is an additive map and $G(X)\ne 0, H(X)$ are generalized polynomials in the variable $X$ with coefficients in $D$. Precisely, it is proved that either $D$ is finite-dimensional over its center or $f$ is an elementary operator. Applying the result and its consequences, we prove that if $D$ is a noncommutative division ring of characteristic not $2$, then the only solution of additive maps $f, g$ on $D$ satisfying the identity $f(x) = x^n g(x^{-1})$ with $n\ne 2$ a positive integer is the trivial case, that is, $f=0$ and $g=0$. This extends Catalano and Merch\'{a}n's result in 2023 to get a complete solution.
- Subjects :
- Mathematics - Rings and Algebras
16R60 (Primary) 16R50, 16K40 (Secondary)
Subjects
Details
- Database :
- arXiv
- Journal :
- J. Algebra 647 (2024) 492-514
- Publication Type :
- Report
- Accession number :
- edsarx.2401.03112
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.jalgebra.2024.03.002