Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extra-twisted connected sum G_2-manifolds   We present a construction of closed 7-manifolds of holonomy G_2, which
generalises Kovalev's twisted connected sums by taking quotients of the pieces
in the construction before gluing. This makes it possible to realise a wider
range of topological types, and Crowley, Goette and the author arXiv:1505.02734
use this to exhibit examples of closed 7-manifolds with disconnected moduli
space of holonomy G_2 metrics.

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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con