Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Simplicity of C$^*$-algebras Associated to Multispinal Groups   We characterize the simplicity of universal C$^*$-algebras arising from
multispinal groups. Let $\mathcal{O}_{G_{\max}}$ be the universal C$^*$-algebra
associated to a multispinal group $G$. We show that the invertibility of a
matrix completely determines the simplicity of $\mathcal{O}_{G_{\max}}$.

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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex