Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From the Tetrahedron Equation to Universal R-Matrices   Modified universal R-matrices, associated with the central extension (through
the Drinfeld's double construction) of the quantum groups U_q(sl_n), are
realized through an infinite dimensional spectral parameter dependent solution
for the tetrahedron equation, provided a certain identity on $q$-exponentials
holds true.

24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin