Billiards — Spacetime Groups

Spacetime Groups

Background Tutorial Notation Colourings Subgroups Torus Cayley graphs Hierarchy History Catalogues Showcase 275 spacetime 275 spacetime (grouped) 68 colored<>polar crystals 609 patterns 107 Escher Gallery Reaction–diffusion Colourings Entangled colourings Gyre Trefoil Monochrome Developer Reports Motifs Designer Billiards Superseded 269 coloured crystals

³3∗²3 — xu235 — solver

Spacetime groups: the crystallography of looping animations · source