I am going to give you 1 million dollars

Nonius · Post by **Nonius** » Mon May 23, 2011 11:57 pm

Pass the shrooms

Nonius · Post by **Nonius** » Sat Nov 12, 2011 11:01 am

Birds

rod · Post by **rod** » Tue Nov 15, 2016 6:34 pm

Henry Segerman: [i]"Perhaps my most effective work is “Grid (stereographic projection)”. A light placed at the top of a 3D printed sphere casts a surprising square grid shadow."[/i]

[img]/User%20Files/2119/grid_stereographic_projection_900.jpeg[/img]

chiral3 · Post by **chiral3** » Tue Nov 15, 2016 6:54 pm

If he was surprised I'd assume he didn't know what conformal mapping was prior. What an amazing coincidence to wind up with tat sphere!

rod · Post by **rod** » Tue Nov 15, 2016 6:58 pm

Henry Segerman got a PhD at Stanford. I think he meant "surprising to the layperson".

rod · Post by **rod** » Wed Nov 16, 2016 12:02 pm

Drawing an ellipse using the Elliptical Trammel:

[img]https://d2t1xqejof9utc.cloudfront.net/screenshots/pics/ee274a8a5d18cddc5a2a16e82905ef0c/large.gif[/img]

Trammel of Archimedes

rod · Post by **rod** » Thu Nov 17, 2016 12:58 pm

Another way of drawing an ellipse:

[img]/User%20Files/2119/ellipse.gif[/img]