Graph bundles and Ricci‐flatness

Abstract

AbstractWe develop a systematic way of constructing S‐Ricci flat graphs that are not Abelian Cayley via graph bundle with explicit examples. For this purpose, we prove that, with some natural constrains, a nontrivial graph bundle cannot be isomorphic (as graphs) to the product of the base graph and fiber graph. It stands in clear contrast to the continuous case.