“singularity”的概念、定义、翻译、参考文献-科学参考

singularity

Physics

Somewhere in space–time where general relativity theory predicts that certain quantities, such as the curvature of space–time, become infinite. For example, singularities are predicted to occur at the big bang and at the centre of a black hole. The existence of singularities is usually regarded as a limitation of general relativity theory. It has been suggested that singularities will not occur in a full theory of quantum gravity due to space–time being an emergent quantity in such a theory.

Mathematics

A singularity in a fluid is a point where the flow velocity is not defined, such as with a source, sink, or vortex. Streamlines may only meet at stagnation points and singularities.

A point source

A point sink

A point vortex

Astronomy

A mathematical point at which certain physical quantities reach infinite values. For example, according to general relativity, the curvature of spacetime becomes infinite in a black hole. In the Big Bang theory the Universe was born from a singularity in which the density and temperature of matter were infinite. See also naked singularity.

Geology and Earth Sciences

In meteorology, a short seasonal episode lasting a few days and commonly occurring about specific dates of the year. One example is the periods of fine, dry, warm weather commonly occurring in September and early October in Britain and central Europe, and known as ‘old wives’ summer’ (or ‘Indian summer’), which are due to slow-moving anticyclones.

Philosophy

In cosmology, a point at which ordinary calculations break down because certain physical quantities become infinite: for example, the ‘event’ at the beginning of the big bang, at which in some theories the density of matter and the curvature of spacetime is infinite.

单词	singularity
释义	singularity Physics Somewhere in space–time where general relativity theory predicts that certain quantities, such as the curvature of space–time, become infinite. For example, singularities are predicted to occur at the big bang and at the centre of a black hole. The existence of singularities is usually regarded as a limitation of general relativity theory. It has been suggested that singularities will not occur in a full theory of quantum gravity due to space–time being an emergent quantity in such a theory. Mathematics A singularity in a fluid is a point where the flow velocity is not defined, such as with a source, sink, or vortex. Streamlines may only meet at stagnation points and singularities. A point source A point sink A point vortex Astronomy A mathematical point at which certain physical quantities reach infinite values. For example, according to general relativity, the curvature of spacetime becomes infinite in a black hole. In the Big Bang theory the Universe was born from a singularity in which the density and temperature of matter were infinite. See also naked singularity. Geology and Earth Sciences In meteorology, a short seasonal episode lasting a few days and commonly occurring about specific dates of the year. One example is the periods of fine, dry, warm weather commonly occurring in September and early October in Britain and central Europe, and known as ‘old wives’ summer’ (or ‘Indian summer’), which are due to slow-moving anticyclones. Philosophy In cosmology, a point at which ordinary calculations break down because certain physical quantities become infinite: for example, the ‘event’ at the beginning of the big bang, at which in some theories the density of matter and the curvature of spacetime is infinite.
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