Graph quasivarieties
Rings and Algebras
2020-05-19 v1 Combinatorics
Abstract
Introduced by C. R. Shallon in 1979, graph algebras establish a useful connection between graph theory and universal algebra. This makes it possible to investigate graph varieties and graph quasivarieties, i.e., classes of graphs described by identities or quasi-identities. In this paper, graph quasivarieties are characterized as classes of graphs closed under directed unions of isomorphic copies of finite strong pointed subproducts.
Keywords
Cite
@article{arxiv.1905.11134,
title = {Graph quasivarieties},
author = {Erkko Lehtonen and Reinhard Pöschel},
journal= {arXiv preprint arXiv:1905.11134},
year = {2020}
}
Comments
15 pages