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Physics
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Mahtab's user avatar
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Mahtab
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3
What is difference between an infinitesimal displacement $dx$ and a basis one-form given by the gradient of a coordinate function?
Aug 22, 2023
3
Classifying projective representations
Mar 11
3
Why a scalar particle with momentum orbit $\mathcal{O}_p$ is irreducible?
May 4
3
Why do we study Heisenberg Lie group or Heisenberg Lie algebra?
May 25
2
On the Wigner symmetry representation theorem
Feb 7
2
How can I construct a projective representation when the group is not simply connected?
Apr 1
2
A reference for the fact that the second cohomology of the full Poincare algebra is zero
Jul 11
1
A difficulty with the notion of a uniformly accelerated reference frame
Nov 9, 2023
1
How to get the quantity $\epsilon =-g_{\mu \nu}\frac{dx^{\mu}}{d\lambda}\frac{dx^{\nu}}{d\lambda}$ is constant along the geodesic? [duplicate]
Jan 23
1
2-dimensional connected Lorentz group [closed]
Apr 29
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6
How many groups $G_i$ (up to isomorphism) are there such that $G\cong G_i \times \mathbb{Z}$?
6
Autocommutator subgroup is a characteristic subgroup