Keywords: Tietze-Moebius.svg Möbius strip into six mutually-adjacent regions found by Heinrich Franz Friedrich Tietze in 1910 The vertices and edges at the boundaries of the regions form an embedding of Tietze's graph 2014-10-05 14 24 49 own David Eppstein other versions cc-zero Uploaded with UploadWizard Moebius strip Tietze's graph |