Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Annihilating polynomials for quadratic forms and Stirling numbers of the
  second kind   We present a set of generators of the full annihilator ideal for the Witt
ring of an arbitrary field of characteristic unequal to two satisfying a
non-vanishing condition on the powers of the fundamental ideal in the torsion
part of the Witt ring. This settles a conjecture of Ongenae and Van Geel. This
result could only be proved by first obtaining a new lower bound on the 2-adic
valuation of Stirling numbers of the second kind.

4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin