Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized BIons in M-theory   In string theory, stacks of D1-branes can expand into intersecting D3-branes.
These configurations are called (generalized) BIons. We show how the analogous
constructions in M-theory, where M2-branes blow up into calibrated
intersections of M5-branes, arise from some of the membrane theories.

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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: econ