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Questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances. Such a question should typically be in Community Wiki mode (CW); after asking, please, flag for moderators attention requesting the question to be made CW.

9 votes

Examples of common false beliefs in mathematics

Here is a short list of some false beliefs I had when I was studying mathematics, I suppose they may be common but I have never checked: I was in the last year of high school and studying university …
Martin Sleziak's user avatar
9 votes

Interactive model of the hyperbolic plane for a general public lecture

I cannot omit mentionning the work of Jeff Weeks, which is way more complete than mine: http://geometrygames.org/ Click on Kaleidotile, this program can do tilings on the sphere, the Euclidean plane …
Arnaud Chéritat's user avatar
38 votes
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Interactive model of the hyperbolic plane for a general public lecture

By chance I wrote, not long ago, the following applet (HTML5+JS+WebGL) that works at least on Firefox and Chrome. https://www.math.univ-toulouse.fr/~cheritat/AppletsDivers/Escher/ This work is CC-BY …
Arnaud Chéritat's user avatar