The electrical response matrix of a regular 2n-gon

Consider a unit-resistive plate in the shape of a regular polygon with 2n sides, in which even-numbered sides are wired to electrodes and odd-numbered sides are insulated. The response matrix, or Dirichlet-to-Neumann map, allows one to compute the currents flowing through the electrodes when they ar...

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Bibliographic Details
Published in:arXiv.org 2008-06
Main Authors: Blair-Stahn, Nathaniel D, Wilson, David B
Format: Article
Language:English
Subjects:
Dirichlet problem
Electrodes
Online Access:Get full text
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Summary:Consider a unit-resistive plate in the shape of a regular polygon with 2n sides, in which even-numbered sides are wired to electrodes and odd-numbered sides are insulated. The response matrix, or Dirichlet-to-Neumann map, allows one to compute the currents flowing through the electrodes when they are held at specified voltages. We show that the entries of the response matrix of the regular 2n-gon are given by the differences of cotangents of evenly spaced angles, and we describe some connections with the limiting distributions of certain random spanning forests.
ISSN:2331-8422
DOI:10.48550/arxiv.0703826