Some results on double triangle descendants of
Mohamed Laradji
Burnaby, BC, CanadaMarni Mishna
Simon Fraser University, Burnaby, CanadaKaren Yeats
University of Waterloo, Canada
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Abstract
Double triangle expansion is an operation on -regular graphs with at least one triangle which replaces a triangle with two triangles in a particular way. We study the class of graphs which can be obtained by repeated double triangle expansion beginning with the complete graph . These are called double triangle descendants of . We enumerate, with explicit rational generating functions, those double triangle descendants of with at most four more vertices than triangles. We also prove that the minimum number of triangles in any descendant is four. Double triangle descendants are an important class of graphs because of conjectured properties of their Feynman periods when they are viewed as scalar Feynman diagrams, and also because of conjectured properties of their invariants, an arithmetic graph invariant with quantum field theoretical applications.
Cite this article
Mohamed Laradji, Marni Mishna, Karen Yeats, Some results on double triangle descendants of . Ann. Inst. Henri Poincaré Comb. Phys. Interact. 8 (2021), no. 4, pp. 537–581
DOI 10.4171/AIHPD/110