Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Imaginary reflections and discrete symmetries in the heterotic Monster   Let $\mathbb{M}$ be the Monster finite simple group. We give an
interpretation of certain discrete symmetries of a family of heterotic string
compactifications to $1 + 1$ dimensions in terms of discrete symmetries of the
Monster Lie algebra $\frak m$, and more generally Carnahan's family of
Monstrous Lie algebras $\frak m_g$, for $g\in\mathbb{M}$ of Fricke type. We
relate a Weyl group-type reflection $w_{\im}$, with respect to an imaginary
simple root, to a composition of T-duality, time reversal, and parity reversal
transformations in the compactified heterotic string. The transformation
$w_{\im}$ also has a natural permutation action on the BPS states of the
compactified heterotic string.

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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: physics