Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Projective transformations of rotation sets   We give a new proof and extend a result of J. Kwapisz: whenever a set C is
realized as the rotation set of some torus homeomorphism, the image of C under
certain projective transformations is also realized as a rotations set.

19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs