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Results tagged with spacetime
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user 9662
Within relativity (both special and general), changes of reference frames can change both the notions of space and of time, with one depending on the other as well. As a consequence, it is necessary to treat both concepts in a unified manner. Hence the term spacetime.
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Proof that Our Planet is 1D
It is impossible. Suppose the real line, $\mathbb{R}$, is your 1D space and that $\alpha:\mathbb{R}\to \mathrm{Earth}$ is an homeomorphism (physics is more than only topology, but at least the topolol …
- 1,544
3
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In what sense is SUSY a spacetime symmetry?
So indeed, SUSY is related with spacetime in the sense that the generators of this symmetry are intertwined with those of the Poincaré group (=spacetime symmetries) in the relations
$$
[P_\alpha,P_\beta … These add to spacetime "fermionic" extra dimensions, if you want. …
- 1,544
8
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2
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Compactness of spacetime: experiment and math
But
how safe is assuming compactness of spacetime in physics? … This one is perhaps model-dependent:
is there an existing experimental validation of the compactness of spacetime? …
- 1,544