Eulerian Numbers.- Narayana Numbers.- Partially Ordered Sets.- Gamma-nonnegativity.- Weak Order, Hyperplane Arrangements, and the Tamari Lattice.- Refined Enumeration.- Simplicial Complexes.- Barycentric Subdivision.- Coxeter Groups.- W-Narayana Numbers.- Cubes, Carries, and an Amazing Matrix.- Characterizing f-vectors.- Combinatorics for Coxeter groups of Types Bn and Dn.- Affine Descents and the Steinberg Torus.- Hints and Solutions.
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