Induced structures of averaging commutative and cocommutative infinitesimal bialgebras via a new splitting of perm algebras

Fuente: arXiv
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Autori principali: Bai, Chengming, Guo, Li, Liu, Guilai, Zhao, Quan
Natura: Preprint
Pubblicazione: 2025
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author Bai, Chengming
Guo, Li
Liu, Guilai
Zhao, Quan
author_facet Bai, Chengming
Guo, Li
Liu, Guilai
Zhao, Quan
contents It is well-known that an averaging operator on a commutative associative algebra gives rise to a perm algebra. This paper lifts this process to the level of bialgebras. For this purpose, we first give an infinitesimal bialgebra structure for averaging commutative associative algebras and characterize it by double constructions of averaging Frobenius commutative algebras. To find the bialgebra counterpart of perm algebras that is induced by such averaging bialgebras, we need a new two-part splitting of the multiplication in a perm algebra, which differs from the usual splitting of the perm algebra (into the pre-perm algebra) by the characterized representation. This gives rise to the notion of an averaging-pre-perm algebra, or simply an apre-perm algebra. Furthermore, the notion of special apre-perm algebras which are apre-perm algebras with the second multiplications being commutative is introduced as the underlying algebra structure of perm algebras with nondegenerate symmetric left-invariant bilinear forms. The latter are also the induced structures of symmetric Frobenius commutative algebras with averaging operators. Consequently, a double construction of averaging Frobenius commutative algebra gives rise to a Manin triple of special apre-perm algebras. In terms of bialgebra structures, this means that an averaging commutative and cocommutative infinitesimal bialgebra gives rise to a special apre-perm bialgebra.
format Preprint
id arxiv_https___arxiv_org_abs_2509_09884
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Induced structures of averaging commutative and cocommutative infinitesimal bialgebras via a new splitting of perm algebras
Bai, Chengming
Guo, Li
Liu, Guilai
Zhao, Quan
Rings and Algebras
Quantum Algebra
Representation Theory
17A36, 17A40, 17B10, 17D25, 18M70
It is well-known that an averaging operator on a commutative associative algebra gives rise to a perm algebra. This paper lifts this process to the level of bialgebras. For this purpose, we first give an infinitesimal bialgebra structure for averaging commutative associative algebras and characterize it by double constructions of averaging Frobenius commutative algebras. To find the bialgebra counterpart of perm algebras that is induced by such averaging bialgebras, we need a new two-part splitting of the multiplication in a perm algebra, which differs from the usual splitting of the perm algebra (into the pre-perm algebra) by the characterized representation. This gives rise to the notion of an averaging-pre-perm algebra, or simply an apre-perm algebra. Furthermore, the notion of special apre-perm algebras which are apre-perm algebras with the second multiplications being commutative is introduced as the underlying algebra structure of perm algebras with nondegenerate symmetric left-invariant bilinear forms. The latter are also the induced structures of symmetric Frobenius commutative algebras with averaging operators. Consequently, a double construction of averaging Frobenius commutative algebra gives rise to a Manin triple of special apre-perm algebras. In terms of bialgebra structures, this means that an averaging commutative and cocommutative infinitesimal bialgebra gives rise to a special apre-perm bialgebra.
title Induced structures of averaging commutative and cocommutative infinitesimal bialgebras via a new splitting of perm algebras
topic Rings and Algebras
Quantum Algebra
Representation Theory
17A36, 17A40, 17B10, 17D25, 18M70
url https://arxiv.org/abs/2509.09884