Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Roofs and Convexity   Convex roof extensions are widely used to create entanglement measures in
quantum information theory. The aim of the article is to present some tools
which could be helpful for their treatment. Sections 2 and 3 introduce into the
subject. It follows descriptions of Wootter's method, of the "subtraction
procedure", and examples on how to use symmetries.

34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
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
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin