英和和英

名詞

ultragraph (複数形 ultragraphs)

1. (mathematics) A generalization of a directed graph in which the source of an edge is a set of vertices rather than a single vertex.
   • 2015, Daniel Gonçalves, Danilo Royer, “Ultragraphs and shifts over infinite alphabets”, in arXiv^[1]:

     One of the key results needed in the proofs of our conclusions is the realization of a class of ultragraph C*-algebras as partial crossed products, a result of interest on its own..