English Pentagram map Cited by user David Eppstein on 01 May 2024 In mathematics, the pentagram map is a discrete dynamical system on the moduli space of polygons in the projective plane.
English Differential invariant Cited by user Bender235 on 14 Aug 2018 In mathematics, a differential invariant is an invariant for the action of a Lie group on a space that involves the derivatives of graphs of functions in the space.