In the 19th century, mathematicians became interested in the question how mathematical functions *look* *like*. Felix Klein, a German mathematician, painstakingly created such physical models in his lab in Göttingen and popularized them in America when he brought a boatload to the World's Fair in Chicago in 1893. The photo above shows a model of a Clebsch surface from 1880, created by Klein and today kept at the University of Göttingen.

*Source:* Joshua Batson, This Is What Math Equations Look Like in 3-D, Wired (2014)

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**Yvonne Jansen**on**November 1, 2014**, sent by**Saiganesh Swaminathan**. Category: Physical model Tags: education, mathematical functions, plaster
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