Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theories on noncommutative spaces and deformed symmetries   In this thesis we study different aspects of noncommutativity in quantum
mechanics, field theory and gravity. We give particular emphasis on the
underlying symmetries of these theories. Deformations of usual symmetries like
the external space time symmetries and the internal gauge symmetry in
noncommutative theories are analyzed in detail.

9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom