Questions - ASKSAGE: Sage Q&A Forum

159

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2024-09-08 12:20:42 +0100 AndreaMelcarne

SageManifold expand around infinity

297

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2024-08-26 12:29:34 +0100 aneet

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

460

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2024-02-28 11:20:08 +0100 eric_g

Confused about covariant derivatives and tensors in SageMath

191

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2024-02-19 16:46:11 +0100 AKGSage

Comparison between SageMath ODE solvers and Scipy ODE solvers

290

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2024-01-13 14:38:44 +0100 eric_g

Computing the Chern–Pontryagin invariant

385

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2024-01-03 10:28:39 +0100 idontgetoutmuch

Connection Forms not Anti-Symmetric

377

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2023-12-09 11:08:43 +0100 eric_g

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

440

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2023-12-05 15:40:32 +0100 GPN

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

164

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2023-11-26 15:44:38 +0100 eric_g

Wrong result for gradient in spherical coordinates [closed]

sagemanifolds

501

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2023-11-26 11:29:26 +0100 achrzesz

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

153

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2023-11-26 09:28:25 +0100 GPN

differential (1-form) simplifies a bit too much

171

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2023-11-21 14:51:30 +0100 eric_g

grad on a generic metric

294

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2023-11-21 11:22:35 +0100 eric_g

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

274

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2023-11-15 15:39:15 +0100 eric_g

[SageManifolds] Error : Black hole rendering with SageMath

319

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2023-11-15 15:06:14 +0100 eric_g

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

200

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2023-09-08 00:42:22 +0100 John Palmieri

sqrt integral not working

239

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2023-08-31 10:17:12 +0100 eric_g

Covariant derivative

589

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2023-05-24 04:51:20 +0100 Jack Zuffante

Geodesic Won't Plot

211

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2023-03-09 01:08:52 +0100 Florentin Jaffredo

Switching coordinate charts mid-integration with solve_across_charts

193

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2022-08-28 22:02:29 +0100 Sébastien

Manifold not defined

sagemanifolds

286

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2022-08-16 19:32:45 +0100 eric_g

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

261

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2022-05-27 08:57:45 +0100 Bubbz

Coordinate chart restriction raising a floating-point-overflow error

296

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2022-05-23 08:17:32 +0100 eric_g

How to convert a list to components of a PseudoRiemannian metric

226

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2022-05-02 15:02:19 +0100 kva

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

818

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2022-02-25 22:19:12 +0100 eric_g

conjugate of scalar field

302

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2022-01-28 14:41:12 +0100 eric_g

Tensor product of exterior power

298

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1

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2021-12-18 17:08:58 +0100 eric_g

full metric transform

401

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2

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2021-05-11 16:06:36 +0100 Florentin Jaffredo

Geodesics/tangent vector evaluation interpolation error

183

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2021-04-12 06:19:54 +0100 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)?

317

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2021-04-08 09:55:39 +0100 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

Wrong result for gradient in spherical coordinates [closed]

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

differential (1-form) simplifies a bit too much

grad on a generic metric

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

[SageManifolds] Error : Black hole rendering with SageMath

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

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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