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sagemanifolds
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manifolds
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291
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2024-02-28 11:20:08 +0200
eric_g
Confused about covariant derivatives and tensors in SageMath
tensor-fields
sagemanifolds
manifolds
covariant_derivative
348
views
1
answer
no
votes
2024-01-03 10:28:39 +0200
idontgetoutmuch
Connection Forms not Anti-Symmetric
manifolds
sagemanifolds
296
views
1
answer
1
vote
2023-12-05 15:40:32 +0200
GPN
How to collect the derivatives in an expression for a scalar field
manifolds
sagemanifolds
collect
429
views
1
answer
no
votes
2023-11-26 11:29:26 +0200
achrzesz
How to express (-t^2 + x^2 + y^2 + z^2) as (x_μ)^2 ?
manifolds
sagemanifolds
symbolic-expression
105
views
1
answer
no
votes
2023-11-26 09:28:25 +0200
GPN
differential (1-form) simplifies a bit too much
simplify
manifolds
sagemanifolds
234
views
1
answer
1
vote
2022-08-16 19:32:45 +0200
eric_g
Sage Manifolds: Asymptotically de Sitter Spacetime in Fefferman-Graham Gauge
sagemanifolds
manifolds
physics
math
243
views
1
answer
1
vote
2022-01-28 14:41:12 +0200
eric_g
Tensor product of exterior power
sagemanifolds
manifolds
158
views
no
answers
no
votes
2021-04-12 06:19:54 +0200
perfectly_odd
Is there a way to compute the "correct" distributional answer, -4*pi*dirac_delta(r), as the Laplacian of 1/r (in spherical coordinates on Euclidean space)?
manifolds
sagemanifolds
dirac_delta
285
views
no
answers
1
vote
2020-07-10 06:14:08 +0200
wintermute
Defining $S^1$ with four charts
sagemanifolds
manifolds
817
views
1
answer
1
vote
2020-04-30 10:00:00 +0200
eric_g
Multiprocess hangs
manifolds
multiprocessing
sagemanifolds
windows10
393
views
1
answer
no
votes
2019-10-11 00:53:12 +0200
JGC
Inverse of the transition map on a Manifold doesn't hold
manifolds
sagemanifolds
217
views
1
answer
1
vote
2019-09-27 22:41:00 +0200
eric_g
Transformation of derivative under a change of chart
sagemanifolds
manifolds
233
views
1
answer
1
vote
2019-09-27 17:03:29 +0200
eric_g
Display connection coefficients under a change of chart
sagemanifolds
manifolds
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