CSHPM Online Colloquium: Robert Bradley (Jan 28th)

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Nicolas Fillion

Jan 23, 2022, 10:25:16 PMJan 23
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***CSHPM Online Colloquium: Robert Bradley (Jan 28th)***

The Canadian Society for History and Philosophy of Mathematics (http://www.cshpm.org/) invites members as well as the broader scholarly community to the next talk in our online colloquium series via Zoom. Participants are encouraged to become members (for as little as $10-$30/year, depending on your employment status), but it is not required. Non-members can get regular updates on our activities by liking us on Facebook (https://www.facebook.com/cshpmschpm). The talk will last 30 minutes, followed by a Q&A.
ROBERT BRADLEY, Mathematics, Adelphi University, will deliver the 18th talk of the CSHPM Online Colloquium series.
DATE: January 28th
TIME: Vancouver 11:00; Montreal/Toronto 14:00

TITLE: The Marquis' Beak
ABSTRACT: The Marquis de l'Hôpital wrote the first calculus textbook, "Analyse des infiniment petits" (1696).  In his preface, he made it clear that most of the results in his book were not his own, due rather to Leibniz and the Bernoulli brothers, particularly Johann I Bernoulli.  Over the centuries, it has become clear that the Marquis deserves priority for almost nothing in his textbook, and certainly not for the famous Rule that bears his name.

One of de l'Hôpital's original contributions was in the area of evolutes and inflection points: a geometric construction that led him to the discovery of a cusp of the second kind, also called a ramphoid cusp, for its similarity in shape to a bird's beak.  In the context of the "Analyse," this cusp is simply an elegant curiosity.  However, the Marquis' Beak became a matter of renewed interest in the 1740s, attracting the attention of Gua de Malves, Euler, and d'Alembert.  Their contributions to this topic illuminate the 18th century conceptual shift in the calculus from geometric to algebraic.

Please distribute this information to all who might be interested. The information to join the session via Zoom is as follows:

Topic: CSHPM Online Colloquium: Robert Bradley
Time: Jan 28, 2022 11:00 AM Pacific Time (US and Canada)

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Meeting ID: 611 1497 4252
Password: 052883
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