1.2+(sqrt(1-(sqrt(x^2+y^2))^2) + 1 - x^2-y^2) * (sin (10 * (x*3+y/5+7))+1/4) from -1.6 to 1.6
sqrt(cos(x))*cos(300x)+sqrt(abs(x))-0.7) *(4-x*x)^0.01, sqrt(6-x^2), -sqrt(6-x^2) from -4.5 to 4.5
https://www.google.fr/search?q=Récursivité
http://mrdoob.com/projects/chromeexpe...
http://www.google.com/intl/fr/sky/
https://www.google.com/webhp?hl=xx-kl...