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A Subset Expansion of the Coloured Tutte Polynomial

Published online by Cambridge University Press:  03 March 2004

LORENZO TRALDI
Affiliation:
Department of Mathematics, Lafayette College, Easton, Pennsylvania 18042, USA (e-mail: [email protected])

Abstract

Bollobás and Riordan introduce a Tutte polynomial for coloured graphs and matroids in [3]. We observe that this polynomial has an expansion as a sum indexed by the subsets of the ground-set of a coloured matroid, generalizing the subset expansion of the Tutte polynomial. We also discuss similar expansions of other contraction–deletion invariants of graphs and matroids.

Type
Paper
Copyright
2004 Cambridge University Press

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