Hippias - Wikipedia entry on this ancient polymath, including some material from the 1911 Britannica.
Hippias - Brief article on this early Sophist, from the Internet Encyclopedia of Philosophy.
Hippias of Elis - Concise scholarly biography of this discoverer of the quadratrix, from the MacTutor History of Mathematics.
Hippias's Quadratrix - Some brief notes on Hippias' attempt to square the circle using this curve, "a pictorial representation of the irrationality of pi."
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