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PreprintCC BY-NC-SA 4.0arXiv

quantum-group: Exact symbolic verification of R-matrix and Yang--Baxter identities for Uq(sl2) and GLq(2|1)

  • Taha Berk Terekli
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Abstract

Explicit R-matrices of quantum groups are routinely transcribed from the literature, yet whether they satisfy an identity depends on basis order, tensor placement, the coproduct and, for superalgebras, the Koszul sign rule. quantum-group is a Python package that builds such matrices exactly with SymPy and returns every identity as an exact residual matrix, whose nonzero entries locate the convention that disagrees. It covers U_q(sl_2) modules, tensor products and the fundamental R-matrix, and the graded Yang--Baxter equation for GL_q(2|1). Applied to the thesis it was written for, it exposed an R-matrix that satisfies the Yang--Baxter equation but intertwines the opposite coproduct.

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Cite

BibTeXRIS
BibTeX
@misc{terekli2026quantumgroup,
  title = {{quantum-group: Exact symbolic verification of R-matrix and Yang--Baxter identities for $U_q(\mathfraksl_2)$ and $GL_q(2|1)$}},
  author = {Taha Berk Terekli},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.07867},
  eprint = {2610.07867},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.07867},
  note = {CC BY-NC-SA 4.0},
}
RIS
TY  - UNPB
TI  - quantum-group: Exact symbolic verification of R-matrix and Yang--Baxter identities for U_q(sl_2) and GL_q(2|1)
AU  - Taha Berk Terekli
PY  - 2026
DA  - 2026/10/06
PB  - arXiv
DO  - 10.48550/arxiv.2610.07867
UR  - https://arxiv.org/abs/2610.07867
AB  - Explicit R-matrices of quantum groups are routinely transcribed from the literature, yet whether they satisfy an identity depends on basis order, tensor placement, the coproduct and, for superalgebras, the Koszul sign rule. quantum-group is a Python package that builds such matrices exactly with SymPy and returns every identity as an exact residual matrix, whose nonzero entries locate the convention that disagrees. It covers U_q(sl_2) modules, tensor products and the fundamental R-matrix, and the graded Yang--Baxter equation for GL_q(2|1). Applied to the thesis it was written for, it exposed an R-matrix that satisfies the Yang--Baxter equation but intertwines the opposite coproduct.
ER  -