Talk:Viviani's curve

I don't really understand the definition here. Its completly different to the one at the math world link which is the intersection of a sphere and cylinder. How does Rectifiable set have anything to do this? --Salix alba (talk) 17:05, 4 April 2007 (UTC)

Ans: (pos) Doesn't rectifiable refer to rectifiable curve and not rectifiable set? —Preceding unsigned comment added by 78.148.76.0 (talk) 12:59, 18 December 2009 (UTC)