Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Groupoids and the integration of Lie algebroids   We show that a Lie algebroid on a stratified manifold is integrable if, and
only if, its restriction to each strata is integrable. These results allow us
to construct a large class of algebras of pseudodifferential operators.

33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th