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18 Questions

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Gravity from algebra

Oct 31 '18 at 4:23 Qmechanic♦ 115k

vote

answer

views

(Physics version of) Taylor expansion. In the the context of deriving a Lie groups generators (a Lie algebra from a Lie group)

group-theory differentiation lie-algebra calculus

Oct 13 at 11:02 Qmechanic♦ 115k

vote

answers

views

Lorentz algebra and group question with regards to operator representaion of $M^{\mu\nu}$

group-theory lorentz-symmetry lie-algebra

Oct 8 at 15:20 Lopey Tall 73

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answer

162

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Wedge product, tensor product, and Levi-Civita tensor/symbol

general-relativity metric-tensor tensor-calculus

Aug 14 at 17:34 Lopey Tall 73

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answers

views

Alternative definition for Lorentz factor?

general-relativity metric-tensor vectors velocity

Aug 3 at 3:56 Qmechanic♦ 115k

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answers

views

Error with generators of Lorentz group (basis of Lorentz Lie algebra) [closed]

homework-and-exercises special-relativity group-theory lorentz-symmetry lie-algebra

Apr 27 at 23:48 Qmechanic♦ 115k

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answers

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Entropy and observers

cosmology entropy universe observers

Nov 30 at 21:49 Qmechanic♦ 115k

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answer

170

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Isometry definition

general-relativity differential-geometry symmetry ads-cft holographic-principle

Oct 16 '18 at 5:48 A.V.S. 6,429

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answer

146

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Why is angular kinetic energy a part of effective potential energy for orbits?

orbital-motion potential-energy

May 23 '18 at 16:47 Oktay Doğangün 1,340

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answer

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Determining the manifold picture of a Lie group — and thus determining global properties

differential-geometry group-theory lie-algebra

Oct 15 at 13:34 David Bar Moshe 24.9k

votes

answers

views

New locution regarding perturbation theory

quantum-mechanics perturbation-theory

Aug 16 at 21:58 Lopey Tall 73

votes

answers

views

Why strings, and confusion about string coupling constant

string-theory quantum-gravity

Aug 9 at 15:27 Lopey Tall 73

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answer

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A priori knowledge of the components of the Ricci tensor

general-relativity symmetry metric-tensor curvature

Jul 19 at 0:32 G. Smith 24.4k

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Confusion regarding Ricci Scalar

homework-and-exercises general-relativity differential-geometry curvature

Jul 7 at 18:51 Qmechanic♦ 115k

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answers

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Geodesic equation — alternative form

general-relativity differential-geometry metric-tensor geodesics

Jun 11 at 20:18 Qmechanic♦ 115k

votes

answers

views

Index (Einstein summation) notation question

special-relativity metric-tensor notation differentiation

Jun 6 at 16:13 Lopey Tall 73

votes

answer

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Reference request for Lie algebras

general-relativity resource-recommendations lie-algebra poincare-symmetry galilean-relativity

Apr 21 at 20:40 ungerade 994

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154

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Finding the expression for probability density (the Klein Gordon equation)

special-relativity field-theory probability density klein-gordon-equation

Feb 5 at 23:33 Frobenius 6,509

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18 Questions

Gravity from algebra

(Physics version of) Taylor expansion. In the the context of deriving a Lie groups generators (a Lie algebra from a Lie group)

Lorentz algebra and group question with regards to operator representaion of $M^{\mu\nu}$

Wedge product, tensor product, and Levi-Civita tensor/symbol

Alternative definition for Lorentz factor?

Error with generators of Lorentz group (basis of Lorentz Lie algebra) [closed]

Entropy and observers

Isometry definition

Why is angular kinetic energy a part of effective potential energy for orbits?

Determining the manifold picture of a Lie group — and thus determining global properties

New locution regarding perturbation theory

Why strings, and confusion about string coupling constant

A priori knowledge of the components of the Ricci tensor

Confusion regarding Ricci Scalar

Geodesic equation — alternative form

Index (Einstein summation) notation question

Reference request for Lie algebras

Finding the expression for probability density (the Klein Gordon equation)