Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Janus and J-fold solutions in type IIB supergravity   I discuss recent supergravity constructions of type IIB holographic
interfaces in four-dimensional ${\cal N}=1$ and ${\cal N}=4$ field theories. I
explain how each holographic interface can be compactified on a circle with an
SL$(2,{\bf Z})$ monodromy leading to a novel AdS$_4$ supergravity solution.
These AdS$_4$ backgrounds are argued to be dual to so-called J-fold
superconformal field theories in three dimensions.

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The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys