The most wonderful teacher
a portrait of Herbert Wilf
(November 20, 2008)
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The master of perfection,
a portrait of Don Knuth
(August 16, 2008)
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The indiscrete thinker
a portrait of Gian-Carlo Rota
(November 15, 2008)
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``Prove and conjecture''
a portrait of Paul Erdös
(July 16, 2008)
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The ultimate juggler
A portrait of Ronald Graham
(March 15, 2009)
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