Finite Rigid Sets in Curve Complexes of Non-Orientable Surfaces

Abstract

A rigid set in a curve complex of a surface is a subcomplex such that every locally injective simplicial map from the set into the curve complex is induced by a homeomorphism of the surface. In this paper, we find finite rigid sets in the curve complexes of connected non-orientable surfaces of genus $g$ with $n$ holes for $g+n\ne 4$.

Improved writing, typos corrected, figures redrawn