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Jun 25, 2011 at 20:34 comment added Gerhard Paseman As a guess, the average of a torus and a sphere should (in my mind) be a pinched sphere or a closed donut, namely a sphere with two antipodes identified as the same point. Gerhard "Donut holes? Hmmm. Back soon." Paseman, 2011.06.25
Jun 25, 2011 at 19:49 history edited Joseph O'Rourke
Added some more relevant tags.
Jun 25, 2011 at 19:18 answer added Joseph O'Rourke timeline score: 1
Jun 25, 2011 at 15:29 comment added Douglas Zare Given $2$ surfaces, you can consider the locus of points equidistant from them. However, this might not have the properties you expect.
Jun 24, 2011 at 22:05 comment added Douglas Zare What is intuitively obvious? What is the average between a sphere and a torus?
Jun 24, 2011 at 20:07 answer added JSE timeline score: 1
Jun 24, 2011 at 16:38 history asked Matt CC BY-SA 3.0