Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional gauge dynamics and the topology of singular
  determinantal varieties   We record an observation about the Witten indices in two families of gauged
linear sigma models: the U(2) model for linear sections of Grassmannians, and
the U(1) model for quadric complete intersections. We describe how the Witten
indices are related to the Euler characteristics of the singular skew-symmetric
or symmetric determinantal varieties featuring in the analysis of their
opposite phases, and we discuss the extent to which these relationships can be
reconciled with standard Born-Oppenheimer arguments.

28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys