Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A geometric construction of the Witten genus, I   I describe how the Witten genus of a complex manifold $X$ can be seen from a
rigorous analysis of a certain two-dimensional quantum field theory of maps
from a surface to $X$.

27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat