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**Descartes**on Polyhedra: A Study of the "De solidorum elementis" is a**book**in the history of mathematics, concerning the work of René**Descartes**on polyhedra.Central to the**book**is the disputed priority for Euler's polyhedral formula between Leonhard Euler, who published an explicit version of the formula, and**Descartes**, whose De solidorum elementis includes a result from which the formula is ...The

**Descartes**Systems Group Inc. (commonly referred to as**Descartes**) is a Canadian multinational technology company specializing in logistics software, supply chain management software, and cloud -based services for logistics businesses.**Descartes'**rule of signs. In mathematics,**Descartes'**rule of signs, first described by René**Descartes**in his work La Géométrie, is a technique for getting information on the number of positive real roots of a polynomial. It asserts that the number of positive roots is at most the number of sign changes in the sequence of polynomial's ...Principles of Philosophy ( Latin: Principia Philosophiae) is a

**book**by René**Descartes**. In essence, it is a synthesis of the Discourse on Method and Meditations on First Philosophy. [1] It was written in Latin, published in 1644 and dedicated to Elisabeth of Bohemia, with whom**Descartes**had a long-standing friendship.The World, also called Treatise on the Light ( French title: Traité du monde et de la lumière ), is a

**book**by René**Descartes**(1596–1650). Written between 1629 and 1633, it contains a nearly complete version of his philosophy, from method, to metaphysics, to physics and biology .**Descartes**espoused mechanical philosophy, a form of natural ...View history

**Descartes'**Error: Emotion, Reason, and the Human Brain is a 1994**book**by neuroscientist António Damásio describing the physiology of rational thought and decision, and how the faculties could have evolved through Darwinian natural selection. [1]In number theory, a

**Descartes**number is an odd number which would have been an odd perfect number, if one of its composite factors were prime.They are named after René**Descartes**who observed that the number D = 3 2 ⋅7 2 ⋅11 2 ⋅13 2 ⋅22021 = (3⋅1001) 2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if only 22021 were a prime number, since the sum-of-divisors ...