Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Canonical and D-transformations in Theories with Constraints   A class class of transformations in a super phase space (we call them
D-transformations) is described, which play in theories with second-class
constraints the role of ordinary canonical transformations in theories without
constraints.

2
The categories of this paper are: math
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci