Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quiver varieties and t-analogs of q-characters of quantum affine
  algebras   Let us consider a specialization of an untwisted quantum affine algebra of
type $ADE$ at a nonzero complex number, which may or may not be a root of
unity. The Grothendieck ring of its finite dimensional representations has two
bases, simple modules and standard modules. We identify entries of the
transition matrix with special values of ``computable'' polynomials, similar to
Kazhdan-Lusztig polynomials. At the same time we ``compute'' $q$-characters for
all simple modules. The result is based on ``computations'' of Betti numbers of
graded/cyclic quiver varieties. (The reason why we put `` '' will be explained
in the end of the introduction.)

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The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex