Comments on Petit TODO pour plus tard

F'x (2013-11-24T20:46:55Z)

Peirce est apparement quasi-trivial (pour quelqu'un qui comprend ce qu'il faut faire) à calculer en Mathematica: http://mathematica.stackexchange.com/questions/24257/peirces-quincuncial-projection

Dans ton cas, quelle serait la formule à utiliser à la place de :

With[{w = JacobiCN[#[[1]] + I #[[2]], 1/2]}, {Arg[w], 2 ArcCot[Abs[w]]}]

qui est la fonction qui à (x,y) associe (arg(w), 2 arccot(abs(w)) où w = JacobiCN (x + i y, 1/2)
(et JacobiCN est la fonction elliptique de Jacobi) ?

P. Dupont (2013-11-20T19:57:25Z)

Vastitude ?

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