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arXiv · 2610.39366

Graded Automorphism of Multiparameter Quantum Matrix Algebra

Hai Jin
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Abstract

We determine the graded automorphism group of the multiparameter quantum matrix algebra $\mathcal O_{λ,\mathbf p}(M_n(\Bbbk))$ over an arbitrary field $\Bbbk$ for all $n\ge2$ and $λ\ne1$. No other restrictions are assumed on $\mathbf p$ or $λ$. Every graded automorphism is a torus automorphism, possibly followed by transposition or by simultaneous reversal of the row and column indices. We give the precise parameter conditions for these two involutions. As an application, we also determine the full automorphism group when the multiplicative group generated by the parameters is torsion-free.

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Hai Jin. 2026-10-29. Graded Automorphism of Multiparameter Quantum Matrix Algebra. https://arxiv.org/abs/2610.39366

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