definite metric
71Inflation (cosmology) — Inflation model and Inflation theory redirect here. For a general rise in the price level, see Inflation. For other uses, see Inflation (disambiguation). Physical cosmology …
72Canadian English — (CanE, en CA) [en CA is the language code for Canadian English , as defined by ISO standards (see ISO 639 1 and ISO 3166 1 alpha 2) and Internet standards (see IETF language tag).] is the variety of English used in Canada. More than 26 million… …
73Asymptotically flat spacetime — An asymptotically flat spacetime is a Lorentzian manifold in which, roughly speaking, the curvature vanishes at large distances from some region, so that at large distances, the geometry becomes indistinguishable from that of Minkowski… …
74Musical isomorphism — In mathematics, the musical isomorphism (or canonical isomorphism) is an isomorphism between the tangent bundle TM and the cotangent bundle T*M of a Riemannian manifold given by its metric. There are similar isomorphisms on symplectic manifolds.… …
75Deformation (mechanics) — This article is about deformation in mechanics. For the term s use in engineering, see Deformation (engineering). Deformation in continuum mechanics is the transformation of a body from a reference configuration to a current configuration.[1] A… …
76music, Western — Introduction history of Western music from ancient times to the present. All ancient civilizations entered historical times with a flourishing musical culture. That the earliest writers explained it in terms of legend and myth is… …
77Indefinite orthogonal group — In mathematics, the indefinite orthogonal group, O( p , q ) is the Lie group of all linear transformations of a n = p + q dimensional real vector space which leave invariant a nondegenerate, symmetric bilinear form of signature ( p , q ). The… …
78Unruh effect — The Unruh effect (or sometimes Fulling–Davies–Unruh effect), was first described by Stephen Fulling in 1973, Paul Davies in 1975 and Bill Unruh in 1976.[1][2][3] It is the prediction that an accelerating observer will observe black body radiation …
79Killing form — In mathematics, the Killing form, named after Wilhelm Killing, is a symmetric bilinear form that plays a basic role in the theories of Lie groups and Lie algebras. In an example of Stigler s law of eponymy, the Killing form was actually invented… …
80Michael Atiyah — Sir Michael Atiyah Born 22 April 1929 (1929 04 22) (age 82) …
