Mathematical Impressions: Curved and Straight? – by George Hart

The elliptic hyperboloid is a beautiful quadratic surface that is “doubly ruled,” meaning that the surface, although curved, contains two straight lines through each point…Here it is applied to the design of a walk-through archway in the teaching garden at the University of British Columbia in Vancouver.”

Simons Foundation.

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martin56jones

"The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colours or the words, must fit together in a harmonious way. " G H Hardy, A Mathematician's Apology (London 1941).

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