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I just learned that goto have been
released under BSD[1]. It is faster then ATLAS in many case[2]
So if you have time you could replace ATLAS for it.
[1]http://www.tacc.utexas.edu/tacc-projects/goto…
nouiz updated
11 years ago
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@ViralBShah has suggested that all the code that ends up calling
``` julia
ccall(dlsym(_jl_liblpack, ...) ...)
```
which includes much of the current base/linalg_lapack.jl and base/linalg_factoriza…
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On some occasions, the call A.det() for a matrix A results in an error, namely:
IndexError: list index out of range
The error occurs during the dictionary lookup. It seems that rather than fi…
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To use some fast algorithms that only work for fields, the `determinant` method uses the `is_field` method for rings which uses the `is_maximal` method for ideals. Unfortunately, this method is not …
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The following:
```
P. = PolynomialRing(Integers())
u = MatrixSpace(P,3)([[0,0,a],[1,0,b],[0,1,c]])
Q. = PolynomialRing(P)
u.charpoly('x')
```
returns as intended:
```
x^3 + (-1*c)*x^2 + (-1*b)*x -…
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From Sage 2.8.3rc3:
```
==24845== 352 bytes in 44 blocks are definitely lost in loss record 1,423 of 2,587
==24845== at 0x4A05809: malloc (vg_replace_malloc.c:149)
==24845== by 0x946C2A6: __g…
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```
There's a bug in matrix2.pyx which is making my new
Polynomial_integer_dense class fail some doctests.
When you run this command:
matrix(ZZ,3,range(9))._charpoly_hessenberg('Z')
then …
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This was reported by David Loeffler on 9-28-2006:
I'm running SAGE 1.3.7.3.3 on one of Imperial College's public RedHat Linux boxes.
If I load the interpreter and type:
M=MatrixSpace(QQ,3)
G=Matr…