Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the intersection motive of certain Shimura varieties: the case of
  Siegel threefolds   In this article, we construct a Hecke-equivariant Chow motive whose
realizations equal intersection cohomology of Siegel threefolds with regular
algebraic coefficients. As a consequence, we are able to define Grothendieck
motives for Siegel modular forms.

31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con