Questions - ASKSAGE: Sage Q&A Forum

152

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no

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2024-02-28 11:20:08 +0200 eric_g

Confused about covariant derivatives and tensors in SageMath

295

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1

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no

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2024-01-03 10:28:39 +0200 idontgetoutmuch

Connection Forms not Anti-Symmetric

189

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1

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2023-12-05 15:40:32 +0200 GPN

How to collect the derivatives in an expression for a scalar field

175

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no

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no

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2023-12-03 04:23:20 +0200 hunKing

How to define a manifold for representing PDEs in vectorial form?

379

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no

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2023-11-26 11:29:26 +0200 achrzesz

How to express (-t^2 + x^2 + y^2 + z^2) as (x_μ)^2 ?

56

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no

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2023-11-26 09:28:25 +0200 GPN

differential (1-form) simplifies a bit too much

127

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2

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no

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2023-10-03 19:57:19 +0200 John Palmieri

manifolds docs

150

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1

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2023-07-11 15:26:53 +0200 achrzesz

Multiplication of tensor elements

136

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1

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no

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2023-06-23 15:23:50 +0200 eric_g

Keep metric purely symbolic

manifolds

185

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no

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no

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2023-06-11 18:33:27 +0200 shash_ag

modeling a shells analysis problem using sage manifolds.

65

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no

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no

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2023-05-09 19:51:27 +0200 Jack Zuffante

Problem with Geodesic Plotting

180

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2022-08-16 19:32:45 +0200 eric_g

Sage Manifolds: Asymptotically de Sitter Spacetime in Fefferman-Graham Gauge

202

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2022-01-28 14:41:12 +0200 eric_g

Tensor product of exterior power

252

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2021-10-29 14:47:57 +0200 rburing

Differentiate vector field w.r.t a variable not defining the chart

396

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2021-04-29 00:12:46 +0200 eric_g

Differential forms on non-standard spherical coordinates

143

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2021-04-12 06:19:54 +0200 perfectly_odd

Is there a way to compute the "correct" distributional answer, -4pidirac_delta(r), as the Laplacian of 1/r (in spherical coordinates on Euclidean space)?

377

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2

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2

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2021-08-14 12:45:22 +0200 mjungmath

Is there a way to define a submanifold of a Euclidean space by providing a list of implicit constraints, instead of by declaring a separate manifold and explicitly defining the embedding?

272

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2020-07-10 06:14:08 +0200 wintermute

Defining $S^1$ with four charts

599

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no

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2020-06-22 13:55:55 +0200 rburing

Coefficient of Polynomial of Differential Forms and displaying List for differential forms

196

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1

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no

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2020-05-21 11:11:39 +0200 LPsFR

manifolds : ricci_scalar() has no attribute 'at' [closed]

640

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2020-04-30 10:00:00 +0200 eric_g

Multiprocess hangs

339

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no

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2019-10-11 00:53:12 +0200 JGC

Inverse of the transition map on a Manifold doesn't hold

158

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2019-09-27 22:41:00 +0200 eric_g

Transformation of derivative under a change of chart

190

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2019-09-27 17:03:29 +0200 eric_g

Display connection coefficients under a change of chart

252

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1

answer

1

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2019-08-19 18:54:55 +0200 rburing

Defining manifolds in a systematic way.

manifolds

430

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1

answer

1

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2018-11-07 08:24:28 +0200 eric_g

Restriction of domain of vector field

470

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1

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1

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2018-01-30 11:43:54 +0200 eric_g

Pullback computation hanging

117

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no

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no

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2018-01-29 17:28:30 +0200 Jeremy Lane

Pullback computation is hanging. [closed]

615

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2

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2

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2018-01-06 14:05:14 +0200 eric_g

29 questions

Confused about covariant derivatives and tensors in SageMath

Connection Forms not Anti-Symmetric

How to collect the derivatives in an expression for a scalar field

How to define a manifold for representing PDEs in vectorial form?

How to express (-t^2 + x^2 + y^2 + z^2) as (x_μ)^2 ?

differential (1-form) simplifies a bit too much

manifolds docs

Multiplication of tensor elements

Keep metric purely symbolic

modeling a shells analysis problem using sage manifolds.

Problem with Geodesic Plotting

Sage Manifolds: Asymptotically de Sitter Spacetime in Fefferman-Graham Gauge

Tensor product of exterior power

Differentiate vector field w.r.t a variable not defining the chart

Differential forms on non-standard spherical coordinates

Is there a way to compute the "correct" distributional answer, -4pidirac_delta(r), as the Laplacian of 1/r (in spherical coordinates on Euclidean space)?

Is there a way to define a submanifold of a Euclidean space by providing a list of implicit constraints, instead of by declaring a separate manifold and explicitly defining the embedding?

Defining $S^1$ with four charts

Coefficient of Polynomial of Differential Forms and displaying List for differential forms

manifolds : ricci_scalar() has no attribute 'at' [closed]

Multiprocess hangs

Inverse of the transition map on a Manifold doesn't hold

Transformation of derivative under a change of chart

Display connection coefficients under a change of chart

Defining manifolds in a systematic way.

Restriction of domain of vector field

Pullback computation hanging

Pullback computation is hanging. [closed]

Potential from an exact differential form

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