Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Another Counter-Example to Dirac's Conjecture   Another counter-example to Dirac's Conjecture is presented, which resembles
the Cawley model but is so modified as to include second class constraints. The
arbitrary function in the general solution to the defining equations of momenta
satisfies a non-linear differential equation. Dirac's conjecture is examined
for some solutions to the equation.

28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn