Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A connection between $\mathcal{R}$-invariants and Yang-Baxter
  $R$-operators in $\mathcal{N}=4$ super-Yang-Mills theory   The BCFW recursion relation in $\mathcal{N}=4$ super-Yang-Mills theory is
solved using Yang-Baxter $R$-operators in the NMHV sector. Explicit expressions
for $\mathcal{R}$-invariants are obtained in terms of the chains of
$R$-operators acting on an appropriate basic state.

5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
1
The categories of this paper are: cs