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arXiv · 1811.08607

Branching rules for Unitary and Symplectic matrices

Uday Bhaskar Sharma·Anupam Singh
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Abstract

This paper concerns the enumeration of simultaneous conjugacy classes of tuples of commuting unitary matrices and of commuting symplectic matrices over a finite field $\mathbf{F}_q$ of odd size. For any given conjugacy class, the orbits for the action of its centralizer group on itself by conjugation are called branches. We determine the branching rules for the unitary groups $U_2(\mathbf{F}_q), U_3(\mathbf{F}_q)$, and for the symplectic groups $Sp_2(\mathbf{F}_q), Sp_4(\mathbf{F}_q)$.

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BibTeXRIS

Uday Bhaskar Sharma, Anupam Singh. 2018-11-21. Branching rules for Unitary and Symplectic matrices. https://doi.org/10.1080/00927872.2020.1726366

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