4 May
2020
4 May
'20
6:05 p.m.
I think the only thing it could be called is "cone on a trefoil knot". —Dan ----- Does this thing <http://gosper.org/verycrosscap.png>have a name? —rwg ParametricPlot3D[{(1 - t) Cos[2 u] (3 + Cos[3 u]), (t - 1) (3 + Cos[3 u]) Sin[2 u], 4 t + (1 - t) Sin[3 u]}, {u, -π, π}, {t, 0, 1}, ViewPoint -> Below] -----