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Geometric Realizations of the Accordion Complex of a Dissection

Geometric Realizations of the Accordion Complex of a Dissection Consider 2n points on the unit circle and a reference dissection  $${\mathrm {D}}_\circ $$ D ∘ of the convex hull of the odd points. The accordion complex of  $${\mathrm {D}}_\circ $$ D ∘ is the simplicial complex of non-crossing subsets of the diagonals with even endpoints that cross a connected subset of diagonals of  $${\mathrm {D}}_\circ $$ D ∘ . In particular, this complex is an associahedron when  $${\mathrm {D}}_\circ $$ D ∘ is a triangulation and a Stokes complex when  $${\mathrm {D}}_\circ $$ D ∘ is a quadrangulation. In this paper, we provide geometric realizations (by polytopes and fans) of the accordion complex of any reference dissection  $${\mathrm {D}}_\circ $$ D ∘ , generalizing known constructions arising from cluster algebras. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Discrete & Computational Geometry Springer Journals

Geometric Realizations of the Accordion Complex of a Dissection

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References (53)

Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Mathematics; Combinatorics; Computational Mathematics and Numerical Analysis
ISSN
0179-5376
eISSN
1432-0444
DOI
10.1007/s00454-018-0004-2
Publisher site
See Article on Publisher Site

Abstract

Consider 2n points on the unit circle and a reference dissection  $${\mathrm {D}}_\circ $$ D ∘ of the convex hull of the odd points. The accordion complex of  $${\mathrm {D}}_\circ $$ D ∘ is the simplicial complex of non-crossing subsets of the diagonals with even endpoints that cross a connected subset of diagonals of  $${\mathrm {D}}_\circ $$ D ∘ . In particular, this complex is an associahedron when  $${\mathrm {D}}_\circ $$ D ∘ is a triangulation and a Stokes complex when  $${\mathrm {D}}_\circ $$ D ∘ is a quadrangulation. In this paper, we provide geometric realizations (by polytopes and fans) of the accordion complex of any reference dissection  $${\mathrm {D}}_\circ $$ D ∘ , generalizing known constructions arising from cluster algebras.

Journal

Discrete & Computational GeometrySpringer Journals

Published: May 29, 2018

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