2 papers
math.DG2014
Configuration spaces of plane polygons and a sub-Riemannian approach to the equitangent problem
J. Jeronimo-Castro, S. Tabachnikov
The equitangent locus of a convex plane curve consists of the points from which the two tangent segments to the curve have equal length. The equitangent problem concerns the relati…
math.MG2012
The equal tangents property
J. Jeronimo-Castro, G. Ruiz-Hernandez, S. Tabachnikov
Let M be a smooth strictly convex closed surface in space and denote by H the set of points x in the exterior of M such that all the tangent segments from x to M have equal lengths…