Extended Brauer analysis of some Dynkin and Euclidean diagrams

• Published in: Electronic research archive 2024-10, Vol.32 (10), p.5752-5782
• Main Authors: Cañadas, Agustín Moreno, Espinosa, Pedro Fernando Fernández, Rodríguez-Nieto, José Gregorio, Mendez, Odette M, Arteaga-Bastidas, Ricardo Hugo
• Format: Article
• Language: English
• ISSN: 2688-1594; 2688-1594
• DOI: 10.3934/era.2024266

The analysis of algebraic invariants of algebras induced by appropriated multiset systems called Brauer configurations is a Brauer analysis of the data defining the multisets. Giving a complete description of such algebraic invariants (e.g., giving a closed formula for the dimensions of algebras induced by significant classes of Brauer configurations) is generally a tricky problem. Ringel previously proposed an analysis of this type in the case of Dynkin algebras, for which so-called Dynkin functions were used to study the numerical behavior of invariants associated with such algebras. This paper introduces two additional tools (the entropy and the covering graph of a Brauer configuration) for Brauer analysis, which is applied to Dynkin and Euclidean diagrams to define Dynkin functions associated with Brauer configuration algebras. Properties of graph entropies defined by the corresponding covering graphs are given to establish relationships between the theory of Dynkin functions, the Brauer configuration algebras theory, and the topological content information theory.