Talk:Whitney umbrella

The parametric equation is not technically correct as the umbrella should include a handle. Hence it needs to be defined by its implicit form.

I've copied the old parametric equation below.

$x \quad = \quad uv$

$y \quad = \quad u$

$z \quad= \quad v^2$

--Pfafrich 21:31, 15 January 2006 (UTC)