Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singular multicontact structures   We describe the automorphisms of a singular multicontact structure, that is a
generalisation of the Martinet distribution. Such a structure is interpreted as
a para-CR structure on a hypersurface M of a direct product space R^2 x R^2. We
introduce the notion of a finite type singularity analogous to CR geometry and,
along the way, we prove extension results for para-CR functions and mappings on
embedded para-CR manifolds into the ambient space.

33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat