2019-06-09 11:29:37 +0100 | asked a question | Directory problems Hi everybody. I would like to create some kind of structure(packages) in sage. Let's say I have the following directory structure: - Main_Dir which contains:
- subdirectories [Dir_A, Dir_B, ...,Test ]
- Dir_A contains some sage files/classes
- file1.sage, file2.sage. In file1.sage I have load('file2.sage')
- My Test directory is the place where I would like to test all the functions I have created. It contains some test files
- test1.sage, test2.sage, ...., assemble_all.sage.
- In test1.sage I have the line load('../Dir_A/file1.sage').
- test1.sage, test2.sage, ...., assemble_all.sage.
- Dir_A contains some sage files/classes
- subdirectories [Dir_A, Dir_B, ...,Test ]
And here I got the following error: raise IOError('did not find file %r to load or attach' % filename) IOError: did not find file './file2.sage' to load or attach I hope somebody has an answer to this kind of problems. |

2019-06-09 11:28:44 +0100 | asked a question | Create new sage project Hi everybody. I would like to create some kind of structure(packages) in sage. Let's say I have the following directory structure: - Main_Dir which contains:
- subdirectories [Dir_A, Dir_B, ...,Test ]
- Dir_A contains some sage files/classes
- file1.sage, file2.sage. In file1.sage I have load('file2.sage')
- My Test directory is the place where I would like to test all the functions I have created. It contains some test files
- test1.sage, test2.sage, ...., assemble_all.sage.
- In test1.sage I have the line load('../Dir_A/file1.sage').
- test1.sage, test2.sage, ...., assemble_all.sage.
- Dir_A contains some sage files/classes
- subdirectories [Dir_A, Dir_B, ...,Test ]
And here I got the following error: raise IOError('did not find file %r to load or attach' % filename) IOError: did not find file './file2.sage' to load or attach I hope somebody has an answer to this kind of problems. |

2018-02-18 15:15:17 +0100 | asked a question | Pullback of ideals Hi. I have the the following question and I hope that somebody of you has a good idea for the implementation and an explanation of the error.
A number field K (in general non Galois) L the Galois closure of K phi: K --> L an arbitrary embedding of K into L I a fractional ideal in K and IL = phi(I)
Let V, W be two QQ vector spaces and f: V --> W a linear map (morphism). Let further V' and W' be subspaces of V and W. The aim is to identify the subspace V' = f^(-1)(W') as the preimage of W' under f. Let p: V x W' --> W be a linear map definied by (v,w')|--> f(v) - w' with ker(p):={(v,w')in V x W'| f(v)-w' = 0_W} = {(v,w'): f(v) = w'}.
Such vectors v are the vectors in the preimage of W'.
Now EXAMPLE 2 returns the corresponding fractional ideal I_ |

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2017-12-05 19:53:37 +0100 | answered a question | Morphism between Klein four group and additive abelian group or order 4 Thank you for the fast answer. C is the always the class group of a quartic/sextic CM filed and G is the corresponding abstract group "printed by sage". Yes, I assume that I have to construct the inverse image too. |

2017-12-05 11:03:14 +0100 | asked a question | Morphism between Klein four group and additive abelian group or order 4 Hi. Let's say I have an ideal class C with structure G := C2 x C2. I want now to construct a morphism phi: G --> C, s.t. phi(g1) = c1 and phi(g2) = c2. |

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