Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twisting and kappa-Poincare   We demonstrate that the coproduct of D=2 and D=4 quantum kappa-Poincare
algebra in classical algebra basis can not be obtained by the cochain twist
depending only on Poincare algebra generators. We also argue that nonexistence
of such a twist does not imply the nonexistence of universal R-matrix.

15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg