Index of bipolar surfaces to Otsuki tori

Egor Morozov

For each rational number $p/q\in (1/2,\sqrt{2}/2)$ one can construct an ${\mathbb{S}}^1$-equivariant minimal torus in ${\mathbb{S}}^3$ called Otsuki torus and denoted by $O_{p/q}$. The La…