dorsal/arxiv
View SchemaOn the multiplicities of the central cocharacter of algebras with polynomial identities
| Authors | Wesley Quaresma Cota, Thais Silva do Nascimento |
|---|---|
| Categories | |
| ArXiv ID | 2601.09546vv1 |
| URL | https://arxiv.org/abs/2601.09546 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
For an associative algebra $A$ over a field of characteristic zero, let $P_n(A)$ and $P_n^z(A)$ denote the spaces of multilinear polynomials of degree $n$ modulo the polynomial identities and the central polynomials of $A$, respectively. We also write $\Delta_n(A)$ for the space of multilinear central polynomials of degree $n$ modulo the polynomial identities of $A$. The corresponding sequences of colengths, central colengths and proper central colengths measure the number of irreducible components in the $S_n$-module decompositions of $P_n(A)$, $P_n^z(A)$ and $\Delta_n(A)$, respectively. In this paper, we investigate several examples of PI-algebras and explicitly describe their cocharacter, central cocharacter and proper central cocharacter sequences. As a consequence, we obtain a complete classification, up to PI-equivalence, of all algebras whose sequences of colengths and central colengths are bounded by a constant.
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"abstract": "For an associative algebra $A$ over a field of characteristic zero, let $P_n(A)$ and $P_n^z(A)$ denote the spaces of multilinear polynomials of degree $n$ modulo the polynomial identities and the central polynomials of $A$, respectively. We also write $\\Delta_n(A)$ for the space of multilinear central polynomials of degree $n$ modulo the polynomial identities of $A$. The corresponding sequences of colengths, central colengths and proper central colengths measure the number of irreducible components in the $S_n$-module decompositions of $P_n(A)$, $P_n^z(A)$ and $\\Delta_n(A)$, respectively. In this paper, we investigate several examples of PI-algebras and explicitly describe their cocharacter, central cocharacter and proper central cocharacter sequences. As a consequence, we obtain a complete classification, up to PI-equivalence, of all algebras whose sequences of colengths and central colengths are bounded by a constant.",
"arxiv_id": "2601.09546",
"authors": [
"Wesley Quaresma Cota",
"Thais Silva do Nascimento"
],
"categories": [
"math.RA"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "On the multiplicities of the central cocharacter of algebras with polynomial identities",
"url": "https://arxiv.org/abs/2601.09546",
"version": "v1"
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