“[T]heoretical considerations and derivations … are always based on severe simplifications of the assumptions.”

—  Heinz Isler

As quoted by Tessa Maurer, Elizabeth O'Grady, Ellen Tung, "Inverse Hanging Membrane: The Naturtheater Grötzingen" http://shells.princeton.edu/Grotz.html ( 2013) Evolution of German Shells Forms: Efficiency of Form, Princeton University Dept. Civil and Environmental Engineering.

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Heinz Isler photo
Heinz Isler 4
engineer 1926–2009

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