Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on the Wehrheim-Woodward category   Wehrheim and Woodward have shown how to embed all the canonical relations
between symplectic manifolds into a category in which the composition is the
usual one when transversality and embedding assumptions are satisfied. A
morphism in their category is an equivalence class of composable sequences of
canonical relations, with composition given by concatenation. In this note, we
show that every such morphism is represented by a sequence consisting of just
two relations, one of them a reduction and the other a coreduction.

18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn