The configuration space of equilateral and equiangular hexagons
  We study the configuration space of equilateral and equiangular spatial hexagons for any bond angle by giving explicit expressions of all the possible shapes. We show that the chair configuration is isolated, whereas the boat configuration allows one-dimensional deformations which form a circle in the configuration space. 
Jun O'Hara
math.MG math.GT physics.comp-ph