2018-10-28 03:07:07 +0100 received badge ● Famous Question (source) 2013-11-01 10:48:52 +0100 received badge ● Notable Question (source) 2012-10-27 09:24:39 +0100 received badge ● Popular Question (source) 2011-05-19 16:26:01 +0100 received badge ● Nice Question (source) 2011-05-19 12:47:21 +0100 answered a question Viviani's Curve Thank you for quick answer! But still we have a problem with plotting. We have this equasions: for sphere: parametric_plot3d((sin(u)*cos(v),sin(u)*sin(v),cos(u)),(v,0,2*pi),(u,0,2*pi))  for cylinder: parametric_plot3d((sin(v),cos(v),u),(v,0,2*pi),(u,0,2*pi))  and viviani's curve: parametric_plot3d((sin(v)*cos(v),sin(v)*sin(v),cos(v)),(v,0,2*pi))  and now we don't know how to put it all together. :( 2011-05-19 12:32:36 +0100 received badge ● Student (source) 2011-05-19 12:18:07 +0100 asked a question Viviani's Curve Hello! How can I plot Viviani's curve in Sage onto cylinder and sphere? My problem is putting sphere into or inside cylinder and then put Viviani's Curve on this.