Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Abelian Gauge Theory, Knots and Odd Khovanov Homology   A homological invariant of 3-manifolds is defined, using abelian Yang-Mills
gauge theory. It is shown that the construction, in an appropriate sense, is
functorial with respect to the families of 4-dimensional cobordisms. This
construction and its functoriality are used to define several link invariants.
The strongest version of these invariants has the form of a filtered chain
complex that can recover Khovanov homology of the mirror image as a bi-graded
group.

25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph