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Metric-tensor
New post in Metric-tensor
Off-diagonal terms in metric for 4D space-time
October 1st, 2022
covariance
metric-tensor
spacetime
special-relativity
tensor-calculus
Normal frames, locally inertial frame and freely falling frame?
January 29th, 2020
reference-frames
metric-tensor
general-relativity
Difference between slanted indices on a tensor
August 1st, 2022
notation
tensor-calculus
metric-tensor
general-relativity
Polyakov action: difference induced metric and dynamical metric
August 1st, 2022
string-theory
differential-geometry
action
metric-tensor
Conformal transformation equation
May 14th, 2020
homework-and-exercises
conformal-field-theory
metric-tensor
How the Lorentz transformation affects the metric tensor?
September 10th, 2020
metric-tensor
special-relativity
Does isotropy imply homogeneity?
August 1st, 2022
metric-tensor
symmetry
spacetime
cosmology
general-relativity
Why is Minkowski spacetime in polar coordinates treated in texts as flat spacetime?
June 27th, 2020
tensor-calculus
metric-tensor
differential-geometry
general-relativity
curvature
Why do we need a metric to define gradient?
February 4th, 2021
differential-geometry
metric-tensor
tensor-calculus
differentiation
covariance
How is the second-order covariant derivative of a scalar computed?
August 1st, 2022
differentiation
differential-geometry
general-relativity
homework-and-exercises
metric-tensor
Proof of the Anti-Commutation Relation for Gamma Matrices from Dirac Equation
August 1st, 2022
metric-tensor
dirac-matrices
clifford-algebra
anticommutator
"Derivation" of Minkowski metric?
May 17th, 2020
general-relativity
special-relativity
metric-tensor
Calculate divergence of vector in curvilinear coordinates using the metric
April 30th, 2020
vector-fields
homework-and-exercises
differential-geometry
metric-tensor
When writing this Lorentz transform as a matrix why do we take the transpose?
March 4th, 2020
notation
linear-algebra
metric-tensor
special-relativity
What manifold is spacetime?
August 1st, 2022
topology
spacetime
general-relativity
metric-tensor
differential-geometry
Does Pythagoras theorem hold for length contraction according to Special relativity?
July 21st, 2021
geometry
special-relativity
metric-tensor
inertial-frames
Schwarzschild metric coordinate sign change in $0\leq r \leq 2GM$
December 20th, 2021
general-relativity
black-holes
metric-tensor
coordinate-systems
Variation of modified Einstein Hilbert Action
January 11th, 2020
general-relativity
variational-principle
homework-and-exercises
metric-tensor
Why does Minkowski space provide an accurate description of flat spacetime?
August 1st, 2022
metric-tensor
special-relativity
Simple conceptual question conformal field theory
December 15th, 2020
field-theory
coordinate-systems
conformal-field-theory
scale-invariance
metric-tensor
What is the Lagrangian from which the Klein-Gordon equation is derived in QFT?
September 15th, 2021
lagrangian-formalism
metric-tensor
field-theory
klein-gordon-equation
Energy-momentum tensor and covariant derivative
April 27th, 2020
general-relativity
lagrangian-formalism
differential-geometry
metric-tensor
stress-energy-momentum-tensor
Tetrad formalism vs coordinate formalism example
September 28th, 2020
general-relativity
metric-tensor
differential-geometry
Why does the FLRW metric assume constant curvature?
March 10th, 2020
general-relativity
cosmology
metric-tensor
curvature
What's the variation of the Christoffel symbols with respect to the metric?
September 4th, 2020
differential-geometry
homework-and-exercises
general-relativity
metric-tensor
variational-calculus
A helpful proof in contracting the Christoffel symbol?
February 9th, 2020
homework-and-exercises
general-relativity
differential-geometry
metric-tensor
Raising and Lowering Indices of Levi-Civita Symbols (+---) metric?
August 1st, 2022
tensor-calculus
special-relativity
notation
metric-tensor
What is the radius of the event horizon?
August 1st, 2022
event-horizon
gravity
metric-tensor
black-holes
general-relativity
String frame and Einstein frame for a Dp-brane
July 21st, 2020
lagrangian-formalism
string-theory
metric-tensor
branes
What's the importance of conformal transformations in general relativity?
November 30th, 2020
general-relativity
metric-tensor
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