Descartes, Rene, 1596-1650 (French mathematician)
Found in 14 Collections and/or Records:
Ad Jo: De Witt Elem: Curvarum, 1680
A demonstratio on one of de Witt's notes on Schooten's 1659 Latin edition of Descartes' Geometria. Unrelated jottings on reverse are in a hand other than Gregory's.
Bayle de refractione, s.d.
A page on the apparent position of planets, in light of Descartes. "Bayle" could conceivably refer to Pierre Bayle (1647-1706), who critiqued Cartesianism once, early in his career, but Peter Bayle was not strictly known as a mathematician or an astronomer.
Charta 4 fol. Notae ad loca quaedam difficiliora Geom: Cartesianae, October 1696
Commentary on Schooten's 1659 edition of Descartes' "Geometria".
Contra Cartesium de refractione, 1680's
A general critique of Cartesian geometry.
Ex Renaldinis de Maximis et Minimis, c1696
Analysis of Renaldini's treatment of maximi and minimi, itself a reworking of Fermat.
Four pages of Descart on curves are bound with this document.
Excerpta et notanda in Kepleri ... ad vitellionem, c1693
A discussion, probably inspired by Sir Isaac Newton, of whether it was Willebrord Snell or Voss who discovered a law of refraction first, from which Rene Descartes arguably derived his version at last.
Explicatio ... in Geometria Cartesiana, et ... de natura aequationum, c1680
Rough notes, very likely composed at Rotterdam, on the Latin edition of Rene Descartes' Geometria, (1659), which was published by Schooten.
Folio C, c1680-c1708
Ichnographia ville prope Leidam ubi Des Cartes mansit, 1680
A ground plan of Descartes' house near Leyden. On the reverse is a Latin treatment of the relationship between religious faith and philosophical certitude.
Index Chartarum in M.S. C. in folio, 1700
An index, in Gregory's hand, to the material he designated as Folio C.
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