Geodesic
The perfect matching association scheme
Srinivasan, Murali K.1
1 Department of Mathematics Indian Institute of Technology Bombay Powai, Mumbai 400076, India
Algebraic Combinatorics, Tome 3 (2020) no. 3, pp. 559-591

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We revisit the Bose–Mesner algebra of the perfect matching association scheme. Our main results are

  • An inductive algorithm, based on solving linear equations, to compute the eigenvalues of the orbital basis elements given the central characters of the symmetric groups.
  • Universal formulas, as content evaluations of symmetric functions, for the eigenvalues of fixed orbitals.
  • An inductive construction of an eigenvector (the so called first Gelfand–Tsetlin vector) in each eigenspace leading to a different inductive algorithm (not using central characters) for the eigenvalues of the orbital basis elements.
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DOI : 10.5802/alco.104
Classification : 05E10, 05E05, 05E30
Keywords: perfect matching association scheme, content evaluation of symmetric functions, Gelfand–Tsetlin vectors.

Srinivasan, Murali K. 1

1 Department of Mathematics Indian Institute of Technology Bombay Powai, Mumbai 400076, India
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits 
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Srinivasan, Murali K. The perfect matching association scheme. Algebraic Combinatorics, Tome 3 (2020) no. 3, pp. 559-591. doi: 10.5802/alco.104

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