Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Null-plane Quantum Universal $R$-matrix   A non-linear map is applied onto the (non-standard) null-plane deformation of
(3+1) Poincar\'e algebra giving rise to a simpler form of this triangular
quantization. A universal $R$-matrix for the null plane quantum algebra is then
obtained from a universal $T$-matrix corresponding to a Hopf subalgebra.
Finally, the associated Poincar\'e Poisson--Lie group is quantized by using the
FRT approach.

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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
3
The categories of this paper are: physics
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn