Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topics on D-brane charges with B-fields   In this review we show how K-theory classifies RR-charges in type II string
theory and how the inclusion of the B-field modifies the general structure
leading to the twisted K-groups. Our main purpose is to give an expository
account of the physical relevance of K-theory and, in order to make it, we
consider different points of view: processes of tachyon condensation,
cancellation of global anomalies and gauge fixings. As a field to test the
proposals of K-theory, we concentrate on the study of the D6-brane, now seen as
a non-abelian monopole.

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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
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The categories of this paper are: stat
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
28
The categories of this paper are: alg-geom
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The categories of this paper are: eess