Fenn–Rourke–Sanderson torsion conjecture for dihedral quandle homology

Let pp be an odd prime, and let Rp\operatorname{R}_p be the dihedral quandle of order pp. Write HnR(Rp)\operatorname{H}^{\rm R}_n(\operatorname{R}_p) for its rack homology. Fenn–Rourke–Sanderson torsion conjecture. For every n>1n>1, the torsion subgroup of HnR(Rp)\operatorname{H}^{\rm R}_n(\operatorname{R}_p) is annihilated by pp. The case corresponding to third rack homology is described as equivalent to a result proved by Mochizuki; the general assertion remains open in the supplied text.

Sources & referencesView supporting material

Primary source

Valeriy Bardakov, Mohamed Elhamdadi and Mahender Singh, “Yang-Baxter Equation and Related Algebraic Structures”, arXiv:2506.23175 (2025).

Additional references

2 papers in this index state this conjecture (2006–2025). The statement above is taken from the most recent of them; the others are arXiv:math/0611803.

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