The conjecture for the number of left braces of order 4p4p

Let b(n)b(n) denote the number of non-isomorphic left braces of size nn. Let p>3p>3 be a prime. The order-4p4p counting conjecture.

b(4p)={11if m1mod4,9if m3mod4.b(4p)=\begin{cases} 11 & \text{if } m\equiv1\bmod4,\\ 9 & \text{if } m\equiv3\bmod4. \end{cases}

The statement is presented as a conjecture suggested by the computed table of values. The variable mm in the congruence conditions is not defined in the supplied context, so the formulation requires checking against the source.

Sources & referencesView supporting material

Primary source

L. Guarnieri and L. Vendramin, “Skew braces and the Yang-Baxter equation”, arXiv:1511.03171 (2016).

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