Superfície[(a + cos(n u / 2) sen(v) - sen(n u / 2) sen(2v)) cos(m u / 2), (a + cos(n u / 2) sen(v) - sen(n u / 2) sen(2v)) sen(m u / 2), sen(n u / 2) sen(v) + cos(n u / 2) sen(2v), u, 0, 4π, v, 0, 2π]
Paul Bourke
[url]http://paulbourke.net/geometry/klein/[/url]
