Spacetime vs Achronal - What's the difference?
spacetime | achronal |
(uncountable, physics) The four-dimensional continuum of the three spatial dimensions plus time.
(physics) An n''-dimensional continuum consisting of dimensions of both space & time. Normally spacetime is considered as having 4 dimensions (''x'', ''y'', ''z'', ''t ), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory.
(relativity) A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.
(physics) Describing a set of points in a spacetime, no two of which have timelike separation
In physics terms the difference between spacetime and achronal
is that spacetime is an n-dimensional continuum consisting of dimensions of both space & time. Normally spacetime is considered as having 4 dimensions (x, y, z, t), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory while achronal is describing a set of points in a spacetime, no two of which have timelike separation.As a noun spacetime
is the four-dimensional continuum of the three spatial dimensions plus time.As an adjective achronal is
describing a set of points in a spacetime, no two of which have timelike separation.spacetime
English
(wikipedia spacetime)Noun
- An event is a point in spacetime , specified by the coordinates x,y,z and t.
- "a Schwarzschild spacetime," "a Reissner-Nordström spacetime," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," etc.