{ "id": "1611.05314", "version": "v1", "published": "2016-11-16T15:25:06.000Z", "updated": "2016-11-16T15:25:06.000Z", "title": "On a special class of general permutahedra", "authors": [ "Geir Agnarsson" ], "comment": "23 pages, 1 figure", "categories": [ "math.CO" ], "abstract": "Minkowski sums of simplices in ${\\mathbb{R}}^n$ form an interesting class of polytopes that seem to emerge in various situations. In this paper we discuss the Minkowski sum of the simplices $\\Delta_{k-1}$ in ${\\mathbb{R}}^n$ where $k$ and $n$ are fixed, their flags and some of their face lattice structure. In particular, we derive a closed formula for their {\\em exponential generating flag function}. These polytopes are simple, include both the simplex $\\Delta_{n-1}$ and the permutahedron $\\Pi_{n-1}$, and form a Minkowski basis for more general permutahedra.", "revisions": [ { "version": "v1", "updated": "2016-11-16T15:25:06.000Z" } ], "analyses": { "subjects": [ "05A15", "52B05", "52B11" ], "keywords": [ "general permutahedra", "permutahedron", "special class", "minkowski sum", "face lattice structure" ], "note": { "typesetting": "TeX", "pages": 23, "language": "en", "license": "arXiv", "status": "editable" } } }