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- W2064382201 abstract "Proper vertex colorings of a graph are related to its boundary map, also called its signed vertex-edge incidence matrix. The vertex Laplacian of a graph, a natural extension of the boundary map, leads us to introduce nowhere-harmonic colorings and analogues of the chromatic polynomial and Stanley's theorem relating negative evaluations of the chromatic polynomial to acyclic orientations. Further, we discuss some examples demonstrating that nowhere-harmonic colorings are more complicated from an enumerative perspective than proper colorings." @default.
- W2064382201 created "2016-06-24" @default.
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- W2064382201 date "2009-07-07" @default.
- W2064382201 modified "2023-09-27" @default.
- W2064382201 title "Nowhere-Harmonic Colorings of Graphs" @default.
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