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Descartes's theorem. Descartes's theorem on the "total defect" of a polyhedron states that if the polyhedron is homeomorphic to a sphere (i.e. topologically equivalent to a sphere, so that it may be deformed into a sphere by stretching without tearing), the "total defect", i.e. the sum of the defects of all of the vertices, is two full circles (or 720° or 4 π radians).
Cubic. Snark. Table of graphs and parameters. In the mathematical field of graph theory, a Descartes snark is an undirected graph with 210 vertices and 315 edges. It is a snark, first discovered by William Tutte in 1948 under the pseudonym Blanche Descartes. [1]
Cartesian anxiety. Cartesian anxiety is a philosophical concept for the conflict that a subject experiences of failing to have—in reality —either a fixed and stable foundation for knowledge of what is and is not real, or an inescapable and incomprehensible groundlessness of reality. [1] Richard J. Bernstein coined and used the term in his ...
"Cogito and the History of Madness" is a 1963 paper by the French philosopher Jacques Derrida that critically responds to Michel Foucault's book History of Madness. In this paper, Derrida questions the intentions and feasibility of Foucault's book, particularly in relation to the historical importance attributed by Foucault to the treatment of madness by Descartes in the Meditations on First ...
Descartes Island is a rocky island 0.2 kilometres (0.1 nmi) long, midway between Lagrange Island and La Conchee and 1.7 kilometres (0.9 nmi) north-northeast of Cape Mousse. It was charted in 1951 by the French Antarctic Expedition and named after René Descartes , the French mathematician and philosopher.
He attended the lectures of Jacques Rohault, and became a follower of the philosophy of René Descartes. He then taught the principles of Cartesianism at Toulouse (1665), Aigues-Mortes, Montpellier (1671), and Paris (1680). The prohibition issued against the teaching of Cartesianism put an end to his lectures.
Descartes' theorem generalizes to mutually tangent great or small circles in spherical geometry if the curvature of the th circle is defined as = , the cotangent of the oriented intrinsic radius. Then: [44] [19]
The Descartes Prize was an annual award in science given by the European Union, named in honour of the French mathematician and philosopher, René Descartes . The prizes recognized Outstanding Scientific and Technological Achievements Resulting from European Collaborative Research. The research prize was first awarded in 2000 and was ...