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2022-03-05 22:34:58 +0200 | marked best answer | Incorrect result for complex integral Not sure if this is user error: I am trying to evaluate the following integral: Sagemath returns 0, but WolframAlpha returns 8. Have I mis-specified the problem, or is this a bug? |

2022-03-05 22:34:03 +0200 | marked best answer | Assume a function is real-valued In the following expression: I would like Sage to make the simplification didn't work:
What is the right way to write this assumption? |

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2022-02-28 01:04:21 +0200 | asked a question | Incorrect result for complex integral Incorrect result for complex integral Not sure if this is user error: I am trying to evaluate the following integral: v |

2022-02-27 20:45:00 +0200 | asked a question | Assume a function is real-valued Assume a function is real-valued In the following expression: var('z') u = function('u')(z) v = function('v')(z) f = |

2022-02-27 20:44:21 +0200 | asked a question | Assume a function is real-valued Assume a function is real-valued In the following expression: var('z') u = function('u')(z) v = function('v')(z) f = |

2022-02-27 20:44:20 +0200 | asked a question | Assume a function is real-valued Assume a function is real-valued In the following expression: var('z') u = function('u')(z) v = function('v')(z) f = |

2021-06-21 15:44:23 +0200 | commented answer | Incorrect result for integral of (cos z) / z My About tab says: ┌────────────────────────────────────────────────────────────────────┐ │ SageMath version 9.1, Relea |

2021-06-21 15:09:34 +0200 | asked a question | Incorrect result for integral of (cos z) / z Incorrect result for integral of (cos z) / z I am confused by the following result: I'd like to integrate cos(z) / z on |

2021-05-02 22:13:02 +0200 | marked best answer | Integrating differential forms I'd like to integrate but it fails with: and I can't find anything about integration in the DiffFormFreeModule documentation. What is the right way to do this? |

2021-05-02 21:42:57 +0200 | asked a question | Integrating differential forms Integrating differential forms I'd like to integrate dx /\ dy over the unit square. Naively, I would expect the followin |

2021-05-02 21:42:54 +0200 | asked a question | Integrating differential forms Integrating differential forms I'd like to integrate dx /\ dy over the unit square. Naively, I would expect the followin |

2021-05-01 22:01:42 +0200 | marked best answer | Differential forms on non-standard spherical coordinates I'd like to compute an exterior derivative in spherical coordinates. So far I have the following: which works for the spherical coordinate transformation that is the default for Euclidean space. But, I see that Sagemath has a different spherical coordinate map than I do: Instead, I'd like: How can I supply a different change of coordinates function for this case? |

2021-04-28 15:42:06 +0200 | commented answer | Differential forms on non-standard spherical coordinates How do I make sure the differential forms are on the right space? (Apologies if my vocabulary is not correct here). When |

2021-04-28 15:41:50 +0200 | commented answer | Differential forms on non-standard spherical coordinates How do I make sure the differential forms are on the right space? (Apologies if my vocabulary is not correct here). When |

2021-04-28 02:26:55 +0200 | commented question | Differential forms on non-standard spherical coordinates Yes, I do -- thanks! How do I get a Manifold that has the right coordinate system attached? |

2021-04-28 02:25:01 +0200 | edited question | Differential forms on non-standard spherical coordinates Differential forms on non-standard spherical coordinates I'd like to compute an exterior derivative in spherical coordin |

2021-04-28 02:16:17 +0200 | asked a question | Differential forms on non-standard spherical coordinates Differential forms on non-standard spherical coordinates I'd like to compute an exterior derivative in spherical coordin |

2021-04-08 15:52:51 +0200 | asked a question | Plotting a 2d subspace of R^3 Plotting a 2d subspace of R^3 I'm trying to plot the 2d subspace of R^3 defined by a pair of vectors. Following some exa |

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2021-04-04 15:55:47 +0200 | edited question | Evaluating a form field at a point on vectors Evaluating a form field at a point on vectors I am having trouble matching up terminology in my textbook (Hubbard's Vect |

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2021-04-04 15:51:03 +0200 | edited question | Evaluating a form field at a point on vectors Evaluating a form field at a point on vectors I am having trouble matching up terminology in my textbook (Hubbard's Vect |

2021-04-04 15:48:57 +0200 | marked best answer | Evaluating a form field at a point on vectors I am having trouble matching up terminology in my textbook (Hubbard's
The expected answer is:
So far I have pieced together the following: which fails with the error:
To construct a vector in but that fails with the same error. What's the right way to construct two vectors in |

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2021-04-03 21:33:51 +0200 | asked a question | Evaluating a form field at a point on vectors Evaluating a form field at a point on vectors I am having trouble matching up terminology in my textbook (Hubbard's Vect |

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