2023-03-12 19:59:16 +0200 | commented answer | Switching coordinate charts mid-integration with solve_across_charts For example in the code that is in my post, whatever the impact parameter al maybe, however large, if b=0 meaning that w |

2023-03-09 19:30:40 +0200 | commented answer | Switching coordinate charts mid-integration with solve_across_charts Thanks for your response. My issue is not with the horizon but with the axis of the object. For example in the edge-on c |

2023-03-07 11:49:36 +0200 | asked a question | Switching coordinate charts mid-integration with solve_across_charts Switching coordinate charts mid-integration with solve_across_charts I am trying to utilize solve_across_charts to avoid |

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2022-05-27 09:28:31 +0200 | commented question | Coordinate chart restriction raising a floating-point-overflow error As it turns out, even though the error is raised, the restriction does pass on the coordinate_chart which is even weirde |

2022-05-27 08:57:45 +0200 | edited question | Coordinate chart restriction raising a floating-point-overflow error Coordinate chart restriction raising a floating-point-overflow error I am using the 9.3 version and what i am trying to |

2022-05-26 20:16:48 +0200 | asked a question | Coordinate chart restriction raising a floating-point-overflow error Coordinate chart restriction raising a floating-point-overflow error I am using the 9.3 version and what i am trying to |

2022-05-26 19:40:32 +0200 | marked best answer | Evaluating the tangent vector of a previously saved and loaded integrated geodesic I am trying to figure out how to load a previously computed and saved integrated geodesic and find the tangent vector using |

2022-04-26 11:33:08 +0200 | asked a question | Evaluating the tangent vector of a previously saved and loaded integrated geodesic Evaluating the tangent vector of a previously saved and loaded integrated geodesic I am trying to figure out how to load |

2021-05-14 14:30:03 +0200 | commented answer | Geodesics/tangent vector evaluation interpolation error Workaround works just fine ! thank you very much! |

2021-05-14 14:28:00 +0200 | marked best answer | Geodesics/tangent vector evaluation interpolation error Hi there. I am trying to evaluate the tangent vector at a specific value of the affine parameter. I have tried everything from https://doc.sagemath.org/html/en/refe... but it raises an error i can't find a solution to. edit: Just to be precise and avoid taking up anyone's time. I am actually trying to create a poincare section of my orbit so i think i could use the numerical solution by calculating the velocity where the sol meets the criteria. Maybe there's an easier way (?). Couldnt think of anything else that can help me find the poincare section after and not during the integration. where using: raises : |

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2021-05-09 22:55:49 +0200 | commented question | Geodesics/tangent vector evaluation interpolation error 'solve_across_charts()' works way better for me when dealing with geodesics that reach the event horizon. A photon that |

2021-05-09 22:55:16 +0200 | commented question | Geodesics/tangent vector evaluation interpolation error 'solve_across_charts()' works way better for me when dealing with geodesics that reach the event horizon. A photon that |

2021-05-09 18:54:35 +0200 | commented question | Geodesics/tangent vector evaluation interpolation error i've included everything on the original post! thanks for your time! really appreciate it. |

2021-05-09 18:53:28 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error Geodesics/tangent vector evaluation interpolation error Hi there. I am trying to evaluate the tangent vector at a specif |

2021-05-09 18:53:11 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error Geodesics/tangent vector evaluation interpolation error Hi there. I am trying to evaluate the tangent vector at a specif |

2021-05-09 13:17:01 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error Geodesics/tangent vector evaluation interpolation error Hi there. I am trying to evaluate the tangent vector at a specif |

2021-05-09 13:00:10 +0200 | commented question | Geodesics/tangent vector evaluation interpolation error I am actually trying to create a poincare section of my orbit so i think i could use the numerical solution by calculati |

2021-05-09 12:40:11 +0200 | commented question | Geodesics/tangent vector evaluation interpolation error Of course. I've edited both into the original post. Haven't really used anything that different than the SageManifolds' |

2021-05-09 12:38:35 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error |

2021-05-09 10:26:39 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error Tangent vector evaluation/Interpolating Geodesic Error Hi there. I am trying to evaluate the tangent vector at a specifi |

2021-05-08 13:01:32 +0200 | edited question | Geodesics/tangent vector evaluation interpolation error Interpolating Geodesic Error Hi there. I am trying to evaluate the tangent vector at a specific value of the affine para |

2021-05-08 12:50:02 +0200 | asked a question | Geodesics/tangent vector evaluation interpolation error Interpolating Geodesic Error Hi there. I am trying to evaluate the tangent vector at a specific value of the affine para |

2021-04-04 12:27:46 +0200 | commented answer | Coordinate charts, functions of one coordinate as bounds of another(?) It could work if in X.add_restrictions(r>R(th)) , R(th) can somehow be a callable function(?). That way i should be a |

2021-04-03 10:19:55 +0200 | edited question | Coordinate charts, functions of one coordinate as bounds of another(?) Coordinate charts, functions of one coordinate as bounds of another(?) Hi there. I have a Manifold (4,M) and its coordin |

2021-04-03 10:18:37 +0200 | edited question | Coordinate charts, functions of one coordinate as bounds of another(?) Coordinate charts, functions of one coordinate as bounds of another(?) Hi there. I have a Manifold (4,M) and its coordin |

2021-04-02 22:38:34 +0200 | edited question | Coordinate charts, functions of one coordinate as bounds of another(?) Coordinate charts, functions of one coordinate as bounds of another(?) Hi there. I have a Manifold (4,M) and its coordin |

2021-04-02 22:38:11 +0200 | commented answer | Coordinate charts, functions of one coordinate as bounds of another(?) I've added on the original post, one of the surfaces (r,th) that i need to pass somehow as a restriction for r. I've tri |

2021-04-02 22:36:06 +0200 | edited question | Coordinate charts, functions of one coordinate as bounds of another(?) |

2021-04-02 19:57:33 +0200 | commented answer | Coordinate charts, functions of one coordinate as bounds of another(?) Thanks for your answer! I'm sorry if I wasn't clear, r=th^2+0.52 was just an example and it does actually work with your |

2021-04-02 16:44:47 +0200 | edited question | Coordinate charts, functions of one coordinate as bounds of another(?) Coordinate charts, functions of one variable as bounds of another(?) Hi there. I have a Manifold (4,M) and its coordinat |

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2021-04-02 16:43:28 +0200 | asked a question | Coordinate charts, functions of one coordinate as bounds of another(?) Coordinate charts, functions of one variable as bounds of another(?) Hi there. I have a Manifold (4,M) and its coordinat |

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2021-03-31 11:56:03 +0200 | marked best answer | Integrating geodesics backwards in time Is it possible to integrate a geodesic equation backwards in time in SageMath? I'm using the following code in order to ray trace null geodesics: where 's' is my affine parameter. From what i've understood, Which does make sense. Any workaround? I've been also trying to set my affine parameter as a negative but this also raises an error. Thanks in advance. |

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2021-03-31 11:55:48 +0200 | commented answer | Integrating geodesics backwards in time It does seem to do the trick for the time being. Simulations still running but so far so good. Thanks a lot! |

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2021-03-30 11:41:54 +0200 | asked a question | Integrating geodesics backwards in time Integrating geodesics backwards in time Is it possible to integrate a geodesic equation backwards in time in sagemath ? |

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