Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comments on the twisted punctures of $A_\text{even}$ class S theory   We point out that the $\text{USp}$ symmetry associated to a full twisted
puncture of a class S theory of type $A_\text{even}$ has the global anomaly
associated to $\pi_4(\text{USp})=\mathbb{Z}_2$. We discuss manifestations of
this fact in the context of the superconformal field theory $R_{2,2N}$
introduced by Chacaltana, Distler and Trimm. For example, we find that this
theory can be thought of as a natural ultraviolet completion of an
infrared-free $\text{SO}(2N+1)$ gauge theory with $2N$ flavors, whose
$\text{USp}(4N)$ symmetry clearly has the global anomaly.

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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: physics
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph