Questions - ASKSAGE: Sage Q&A Forum

65

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2024-09-08 12:20:42 +0200 AndreaMelcarne

SageManifold expand around infinity

235

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2024-08-26 12:29:34 +0200 aneet

How do I speed up the symbolic calculation of Riemann tensor?

291

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

Confused about covariant derivatives and tensors in SageMath

123

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2024-02-19 16:46:11 +0200 AKGSage

Comparison between SageMath ODE solvers and Scipy ODE solvers

217

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2024-01-13 14:38:44 +0200 eric_g

Computing the Chern–Pontryagin invariant

348

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

Connection Forms not Anti-Symmetric

292

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2023-12-09 11:08:43 +0200 eric_g

Plotting transition-of-transition fails with "cannot evaluate symbolic expression"

296

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

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

429

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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 ?

105

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

differential (1-form) simplifies a bit too much

111

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2023-11-26 15:44:38 +0200 eric_g

Wrong result for gradient in spherical coordinates [closed]

sagemanifolds

105

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2023-11-21 14:51:30 +0200 eric_g

grad on a generic metric

264

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2023-11-21 11:22:35 +0200 eric_g

[CoCalc][SageManifolds] Error : Black hole rendering with SageMath 3

259

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2023-11-15 15:06:14 +0200 eric_g

[CoCalc] [SageManifolds] Error : Black hole rendering with SageMath 2

218

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2023-11-15 15:39:15 +0200 eric_g

[SageManifolds] Error : Black hole rendering with SageMath

178

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2023-09-08 00:42:22 +0200 John Palmieri

sqrt integral not working

163

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2023-08-31 10:17:12 +0200 eric_g

Covariant derivative

418

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2023-05-24 04:51:20 +0200 Jack Zuffante

Geodesic Won't Plot

154

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2023-03-09 01:08:52 +0200 Florentin Jaffredo

Switching coordinate charts mid-integration with solve_across_charts

153

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2022-08-28 22:02:29 +0200 Sébastien

Manifold not defined

sagemanifolds

234

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

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

216

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2022-05-27 08:57:45 +0200 Bubbz

Coordinate chart restriction raising a floating-point-overflow error

246

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2022-05-23 08:17:32 +0200 eric_g

How to convert a list to components of a PseudoRiemannian metric

179

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2022-05-02 15:02:19 +0200 kva

Evaluating the tangent vector of a previously saved and loaded integrated geodesic

583

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2022-02-25 22:19:12 +0200 eric_g

conjugate of scalar field

243

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

Tensor product of exterior power

236

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1

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2021-12-18 17:08:58 +0200 eric_g

full metric transform

337

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2021-05-11 16:06:36 +0200 Florentin Jaffredo

Geodesics/tangent vector evaluation interpolation error

158

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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)?

267

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2021-04-08 09:55:39 +0200 eric_g

86 questions

SageManifold expand around infinity

How do I speed up the symbolic calculation of Riemann tensor?

Confused about covariant derivatives and tensors in SageMath

Comparison between SageMath ODE solvers and Scipy ODE solvers

Computing the Chern–Pontryagin invariant

Connection Forms not Anti-Symmetric

Plotting transition-of-transition fails with "cannot evaluate symbolic expression"

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

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

differential (1-form) simplifies a bit too much

Wrong result for gradient in spherical coordinates [closed]

grad on a generic metric

[CoCalc][SageManifolds] Error : Black hole rendering with SageMath 3

[CoCalc] [SageManifolds] Error : Black hole rendering with SageMath 2

[SageManifolds] Error : Black hole rendering with SageMath

sqrt integral not working

Covariant derivative

Geodesic Won't Plot

Switching coordinate charts mid-integration with solve_across_charts

Manifold not defined

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

Coordinate chart restriction raising a floating-point-overflow error

How to convert a list to components of a PseudoRiemannian metric

Evaluating the tangent vector of a previously saved and loaded integrated geodesic

conjugate of scalar field

Tensor product of exterior power

full metric transform

Geodesics/tangent vector evaluation interpolation error

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 built-in way to integrate a vector or differential form field on an embedded submanifold of Euclidean space?

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