Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Looking for the lost torus   We classify the groups definable in the coloured fields obtained by
Hrushovski amalgamation. A group definable in the bad green field is isogenous
to the quotient of a subgroup of an algebraic group by a Cartesian power of the
group of green elements. A definable subgroup of an algebraic group in the
green or red field is an extension of the coloured points of a multiplicative
or additive algebraic group by an algebraic group. In particular, a simple
group in a coloured field is algebraic.

25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph