Reflection-involution characterization conjecture for length-equivalent orthogeodesics

Let α\alpha and β\beta be orthogeodesics. They are length equivalent when they have equal lengths. A reflection involution is an involution reflection acting on the relevant hyperbolic surface. Reflection-involution characterization conjecture. The orthogeodesics α\alpha and β\beta are length equivalent if and only if there is a finite sequence of reflection involutions r1,r2,,rnr_1,r_2,\ldots,r_n such that

r1r2rn(α)=β.r_1 \circ r_2 \circ \cdots \circ r_n(\alpha)=\beta.

Equivalently, there is a finite sequence of r-ortho-isosceles-trapezoids connecting α\alpha and β\beta. This is presented as a conjecture related to the length-equivalent closed-geodesic problem on hyperbolic surfaces; the source gives no evidence that it has been resolved.

Sources & referencesView supporting material

Primary source

Nhat Minh Doan, “Ortho-integral surfaces”, arXiv:2112.10694 (2024).

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