Our animation for @cs_kaplan's #SwirledSeries art project. We start by a making the chessboard hyperbolic and then map conformally the #hyperbolicplane into a… cat!
This is the Harborth graph, the simplest known planar graph in which all the edges are the same length and every vertex has exactly four neighbours. pic.twitter.com/cvwK6W2ymD
The plus sign comes from the abbreviation of the Latin word "et" meaning "and". There were recorded more than 100 abbreviations for "et" before Johann Widman put + in print for the first time in 1489. pic.twitter.com/tX5oc9jQn3