[math-fun] generalized sphericons
20 Aug
2010
20 Aug
'10
6:54 a.m.
Yow, there are totient(n)/2 of these for every star polygon(n/d), i.e. (totient(n)/2)^2 for every n. The nine for n=7: www.tweedledum.com/rwg/sphericons7.PNG . --rwg
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Bill Gosper