Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Verma modules and preprojective algebras   We give a geometric construction of the Verma modules of a symmetric
Kac-Moody Lie algebra in terms of constructible functions on the varieties of
nilpotent finite-dimensional modules of the corresponding preprojective
algebra.

11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
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