Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An extension of the Dirac theory of constraints   Constructions introduced by Dirac for singular Lagrangians are extended and
reinterpreted to cover cases when kernel distributions are either nonintegrable
or of nonconstant rank, and constraint sets need not be closed.

13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg