Esser's Heart Surface

This Demonstration shows Esser's heart surface.

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In 1985, William Esser III was awarded a US patent for the dissection of an ellipsoid to a heart-shaped object. Ernst Lurker, a sculptor, discovered a very similar dissection around the same time.
Reference
[1] G. N. Frederickson, Hinged Dissections: Swinging & Twisting, New York: Cambridge University Press, 2002 pp. 6–7. www.cs.purdue.edu/homes/gnf/book2.html.
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