Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Harmonic superpositions of M-branes   We present solutions describing supersymmetric configurations of 2 or 3
orthogonally intersecting 2-branes and 5-branes of D=11 supergravity. The
configurations which preserve 1/4 or 1/8 of maximal supersymmetry are 2+2, 5+5,
2+5, 2+2+2, 5+5+5, 2+2+5 and 2+5+5 (2+2 stands for orthogonal intersection of
two 2-branes over a point, etc.; p-branes of the same type intersect over
(p-2)-branes). There exists a simple rule which governs the construction of
composite supersymmetric p-brane solutions in D=10 and 11 with a separate
harmonic function assigned to each constituent 1/2-supersymmetric p-brane. The
resulting picture of intersecting p-brane solutions complements their D-brane
interpretation in D=10 and seems to support possible existence of a D=11
analogue of D-brane description. The D=11 solution describing intersecting
2-brane and 5-brane reduces in D=10 to a type II string solution corresponding
to a fundamental string lying within a solitonic 5-brane (which further reduces
to an extremal D=5 black hole). We also discuss a particular D=11 embedding of
the extremal D=4 dyonic black hole solution with finite area of horizon.

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The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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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: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys