Article,

An Improvement of the Inclusion-Exclusion Principle

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Archiv der Mathematik, 72 (4): 298--303 (1999)
DOI: 10.1007/s000130050336

Abstract

We present an improvement of the inclusion-exclusion principle in which the number of terms is reduced by predicted cancellation. The improvement generalizes a related result of Narushima as well as a graph-theoretic theorem of Whitney. Applications concern chromatic polynomials of graphs and permanents of 0,1-matrices.

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