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The pigeonhole principle, two centuries before Dirichlet. (English)
Math. Intell. 36, No. 2, 27-29 (2014).
It is pointed out that what is nowadays famous as the “pigeonhole principle" was already (implicitly) mentioned by the French Jesuit Jean Leurechon [Selectæ propositiones in tota sparsim mathematica pulcherrimæ, Gasparem Bernardum (1622)].
Reviewer: Olaf Teschke (Berlin)
Classification: A30 E50
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