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Non-kissing complexes and tau-tilting for gentle algebras

About this Title

Yann Palu, Vincent Pilaud and Pierre-Guy Plamondon

Publication: Memoirs of the American Mathematical Society
Publication Year: 2021; Volume 274, Number 1343
ISBNs: 978-1-4704-5004-5 (print); 978-1-4704-6912-2 (online)
DOI: https://doi.org/10.1090/memo/1343
Published electronically: December 3, 2021
Keywords: Representations of gentle algebras, support $\tau$-tilting theory, Tamari lattice, associahedron

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Table of Contents

Chapters

  • Acknowledgements
  • Introduction
  • 1. String modules
  • 2. The non-kissing complex
  • 3. The non-kissing lattice
  • 4. The non-kissing associahedron

Abstract

We interpret the support $\tau$-tilting complex of any gentle bound quiver as the non-kissing complex of walks on its blossoming quiver. Particularly relevant examples were previously studied for quivers defined by a subset of the grid or by a dissection of a polygon. We then focus on the case when the non-kissing complex is finite. We show that the graph of increasing flips on its facets is the Hasse diagram of a congruence-uniform lattice. Finally, we study its $\mathbf {g}$-vector fan and prove that it is the normal fan of a non-kissing associahedron.

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