Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An oriented model for Khovanov homology   We give an alternative presentation of Khovanov homology of links with strict
functoriality result over integers. The construction uses an oriented $sl(2)$
state model allowing a natural definition of the boundary operator as twisted
action of morphisms belonging to a TQFT for trivalent graphs and surfaces.

22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph