General relativity

— For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …



Wikipedia

Spacetime

— For other uses of this term, see Spacetime (disambiguation). Two dimensional analogy of spacetime distortion. Matter changes the geometry of spacetime, this (curved) geometry being interpreted as gravity. White lines do not represent the… …



Wikipedia

Pp-wave spacetime

— In general relativity, the pp wave spacetimes, or pp waves for short, are an important family of exact solutions of Einstein s field equation. These solutions model radiation moving at the speed of light. This radiation may consist of:*… …



Wikipedia

Mathematics of general relativity

— For a generally accessible and less technical introduction to the topic, see Introduction to mathematics of general relativity. General relativity Introduction Mathematical formulation Resources …



Wikipedia

Numerical relativity

— is one of the branches of general relativity that uses numerical methods and algorithms to solve and analyze problems. To this end, supercomputers are often employed to study black holes, gravitational waves, neutron stars and many other… …



Wikipedia

Novikov self-consistency principle

— The Novikov self consistency principle, also known as the Novikov self consistency conjecture, is a principle developed by Russian physicist Igor Dmitriyevich Novikov in the mid 1980s to solve the problem of paradoxes in time travel, which is… …



Wikipedia

String theory

— This article is about the branch of theoretical physics. For other uses, see String theory (disambiguation). String theory …



Wikipedia

Cosmic censorship hypothesis

— The weak and the strong cosmic censorship hypotheses are two mathematical conjectures about the structure of singularities arising in general relativity. Singularities that arise in the solutions of Einstein s equations are typically hidden… …



Wikipedia

Mass in general relativity

— General relativity Introduction Mathematical formulation Resources Fundamental concepts …



Wikipedia

Closed timelike curve

— In mathematical physics, a closed timelike curve (CTC) is a worldline in a Lorentzian manifold, of a material particle in spacetime that is closed, returning to its starting point. This possibility was first raised by Kurt Gödel in 1949, who… …



Wikipedia

Schwarzschild coordinates

— In the theory of Lorentzian manifolds, spherically symmetric spacetimes admit a family of nested round spheres . In such a spacetime, a particularly important kind of coordinate chart is the Schwarzschild chart, a kind of polar spherical… …



Wikipedia

Jürgen Ehlers

— Infobox Scientist box width = 300px name = Jürgen Ehlers caption = At the award ceremony for the Charles University Medal in Potsdam, September 2007 imagesize = 138 birth date = birth date|1929|11|29|mf=y birth place = Hamburg residence = Germany …



Wikipedia

Spacetime symmetries

— refers to aspects of spacetime that can be described as exhibiting some form of symmetry. The role of symmetry in physics is important, for example, in simplifying solutions to many problems. Spacetime symmetries are used to simplify problems and …



Wikipedia

Causal sets

— The causal sets programme is an approach to quantum gravity. Its founding principle is that spacetime is fundamentally discrete and that the spacetime points are related by a partial order. This partial order has the physical meaning of the… …



Wikipedia

Asymptotically 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… …



Wikipedia

Exact solutions in general relativity

— In general relativity, an exact solution is a Lorentzian manifold equipped with certain tensor fields which are taken to model states of ordinary matter, such as a fluid, or classical nongravitational fields such as the electromagnetic field.… …



Wikipedia