Skip to content Skip to navigation
University of Warwick
  • Study
  • |
  • Research
  • |
  • Business
  • |
  • Alumni
  • |
  • News
  • |
  • About

University of Warwick
Publications service & WRAP

Highlight your research

  • WRAP
    • Home
    • Search WRAP
    • Browse by Warwick Author
    • Browse WRAP by Year
    • Browse WRAP by Subject
    • Browse WRAP by Department
    • Browse WRAP by Funder
    • Browse Theses by Department
  • Publications Service
    • Home
    • Search Publications Service
    • Browse by Warwick Author
    • Browse Publications service by Year
    • Browse Publications service by Subject
    • Browse Publications service by Department
    • Browse Publications service by Funder
  • Help & Advice
University of Warwick

The Library

  • Login
  • Admin

Symmetry groupoids and patterns of synchrony in coupled cell networks

Tools
- Tools
+ Tools

Stewart, Ian, Golubitsky, Martin and Pivato, Marcus (2003) Symmetry groupoids and patterns of synchrony in coupled cell networks. SIAM Journal on Applied Dynamical Systems, Vol.2 (No.4). pp. 609-646. doi:10.1137/S1111111103419896

[img]
Preview
PDF
WRAP_Stewart_groupoid_siam.pdf - Requires a PDF viewer.

Download (2378Kb)
Official URL: http://dx.doi.org/10.1137/S1111111103419896

Request Changes to record.

Abstract

A coupled cell system is a network of dynamical systems, or “cells,” coupled together. Such systems
can be represented schematically by a directed graph whose nodes correspond to cells and whose
edges represent couplings. A symmetry of a coupled cell system is a permutation of the cells that
preserves all internal dynamics and all couplings. Symmetry can lead to patterns of synchronized
cells, rotating waves, multirhythms, and synchronized chaos. We ask whether symmetry is the only
mechanism that can create such states in a coupled cell system and show that it is not.
The key idea is to replace the symmetry group by the symmetry groupoid, which encodes information
about the input sets of cells. (The input set of a cell consists of that cell and all cells
connected to that cell.) The admissible vector fields for a given graph—the dynamical systems with
the corresponding internal dynamics and couplings—are precisely those that are equivariant under
the symmetry groupoid. A pattern of synchrony is “robust” if it arises for all admissible vector
fields. The first main result shows that robust patterns of synchrony (invariance of “polydiagonal”
subspaces under all admissible vector fields) are equivalent to the combinatorial condition that an
equivalence relation on cells is “balanced.” The second main result shows that admissible vector
fields restricted to polydiagonal subspaces are themselves admissible vector fields for a new coupled
cell network, the “quotient network.” The existence of quotient networks has surprising implications
for synchronous dynamics in coupled cell systems.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Science > Mathematics
Library of Congress Subject Headings (LCSH): Coupled mode theory, Groupoids, Symmetry (Mathematics)
Journal or Publication Title: SIAM Journal on Applied Dynamical Systems
Publisher: Society for Industrial and Applied Mathematics
ISSN: 1536-0040
Official Date: 2003
Dates:
DateEvent
2003Published
Volume: Vol.2
Number: No.4
Page Range: pp. 609-646
DOI: 10.1137/S1111111103419896
Status: Peer Reviewed
Access rights to Published version: Open Access

Request changes or add full text files to a record

Repository staff actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics

twitter

Email us: wrap@warwick.ac.uk
Contact Details
About Us