Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Trees, valuations and the Green-Lazrsfeld set   The aim of this paper is the study of the relationship between two objects,
the Green-Lazarsfeld set and the Bieri Neumann Strebel invariant.

17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th