Coniques
by Rāshid, Rushdī, Apollonius,, of Perga, Decorps-Foulquier, Micheline, Federspiel, Michel
This text presents the classical theory of conics in a modern form. It includes many novel results that are not easily accessible elsewhere. The approach combines synthetic and analytic methods to derive projective, affine and metrical properties, covering both Euclidean and non…
This text presents the classical theory of conics in a modern form. It includes many novel results that are not easily accessible elsewhere. The approach combines synthetic and analytic methods to derive projective, affine and metrical properties, covering both Euclidean and non…
The physicist, Richard Feynman, sets out to prove Kepler's law of ellipses, using no mathematics more advanced than elementary plane geometry.
On March 13, 1964, Feynman delivered a lecture to the Caltech freshman class, "The Motion of Planets Around the Sun"why the planets move elliptically instead of in perfect circles. For reasons unknown, most probably for his own amusement, he chose to make the argument using math…