Representing polynomial of CONNECTIVITY

06/28/2021 ∙ by Jānis Iraids, et al. ∙ 0

We show that the coefficients of the representing polynomial of any monotone Boolean function are the values of a Moebius function of an atomistic lattice related to this function. Using this we determine the representing polynomial of any Boolean function corresponding to a direct acyclic graph connectivity problem. Only monomials corresponding to unions of paths have non-zero coefficients which are (-1)^D where D is an easily computable function of the graph corresponding to the monomial (it is the number of plane regions in the case of planar graphs). We estimate the number of monomials with non-zero coefficients for the two-dimensional grid connectivity problem as being between Ω(1.641^2n^2) and O(1.654^2n^2).



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