On Sunday, May 3, 2020 at 5:09:28 PM UTC-7 Matthias Koeppe wrote:
> I propose the following goal for Sage 9.3.
>
> Modularize sagelib so that individual parts of it can be built and run
> with a much smaller set of libraries.
>
> In particular, create a package "sage_objects" that makes Sage
We also recently had a ticket about correcting the permutation action on a
matrix, so we also need that to also be consistent.
Best,
Travis
On Tuesday, June 16, 2020 at 4:02:11 AM UTC+10, Nils Bruin wrote:
>
> On Monday, June 15, 2020 at 10:43:51 AM UTC-7, Nils Bruin wrote:
>>
>> There's
On Monday, June 15, 2020 at 10:43:51 AM UTC-7, Nils Bruin wrote:
>
> There's obviously the choice for letting permutations/matrices on the
> left/right, but I think there's a definite preferred choice for how to
> convert to a permutation matrix: the one that makes it a homomorphism. And
> for
On Monday, June 15, 2020 at 9:11:08 AM UTC-7, David Joyner wrote:
>
> This is turning into a political discussion:-) I'm not taking sides!
> You can say something similar about left-kernels vs right-kernels of
> matrices, about left-eigenvectors vs right-eigenvectors. Different
> linear algebra
Don't use SAGE_CHECK=yes, or at least disable testing for the nose package:
it is known to fail its test suite. (See
https://trac.sagemath.org/ticket/28727, for example.) If you want to keep
SAGE_CHECK=yes in general, then temporarily turn it off, install nose (with
`sage -i nose`), and then
On Mon, Jun 15, 2020 at 11:42 AM 'Paul Mercat' via sage-devel <
sage-devel@googlegroups.com> wrote:
> Thank you for your answers.
>
> It's very confusing to write a right action to the left : we write g(i)
> and not (i)g.
> By default it should be a left action.
>
> And its very confusing that
Group theory convention for composition is the same as in GAP and Magma. It
would be crazy to change it for a variety of reasons...
Whereas Permutation comes from combinatorics, I don't know why they took a
different default.
On Mon, 15 Jun 2020, 16:42 'Paul Mercat' via sage-devel, <
Thank you for your answers.
It's very confusing to write a right action to the left : we write g(i) and
not (i)g.
By default it should be a left action.
And its very confusing that PermutationGroup and Permutation doesn't give
the same matrix for the same permutation.
I think that Sage should
On Mon, Jun 15, 2020 at 11:21 AM 'Paul Mercat' via sage-devel <
sage-devel@googlegroups.com> wrote:
> Another bug with PermutationGroup:
>
> {{
> g1,g2 = PermutationGroup([(1,2,3,4), (1,3,2,4)]).gens()
> (g1*g2)(3), g1(g2(3))
> }}
>
> should gives two times the same result, but it is not the
On 2020-06-15 10:58, 'Paul Mercat' via sage-devel wrote:
> Hi !
>
> Sage doesn't compute correctly the matrix of a Permutation:
>
> matrix(Permutation('(1,2,3,4)'))
>
> return a wrong answer: it returns the inverse of the correct result.
> The product of matrices of permutations must be equal
Another bug with PermutationGroup:
{{
g1,g2 = PermutationGroup([(1,2,3,4), (1,3,2,4)]).gens()
(g1*g2)(3), g1(g2(3))
}}
should gives two times the same result, but it is not the case...
The action of the group on {1,2,3,4} is not an action !
Le lundi 15 juin 2020 16:58:18 UTC+2, Paul Mercat a
Hi !
Sage doesn't compute correctly the matrix of a Permutation:
matrix(Permutation('(1,2,3,4)'))
return a wrong answer: it returns the inverse of the correct result.
The product of matrices of permutations must be equal to the matrix of the
composition.
If we do:
Note that installing nose works, but it fails its own test suite for
some reason. How do you trigger the latter?
Do you have SAGE_CHECK set to 'yes' and exported?
Also, your --prefix=$SAGE_ROOT looks dodgy.
Setting SAGE_ROOT to anything can lead to bad things during the build.
On Mon, Jun 15,
Have you tried with gcc package. For me it works with an intel precessor.
El lunes, 15 de junio de 2020, 11:13:49 (UTC+2), Robert Poole escribió:
>
> I've been trying to build and install Sage locally on a Fedora 32 system
> (64-bit), running on a Ryzen 4700U APU with 8 GB of RAM.
>
> I have
Yes, it looks like a bug.
I've opened https://trac.sagemath.org/ticket/29866
(a slightly simplified example, without a vector with non-integer
coefficients, is there)
On Mon, Jun 15, 2020 at 8:28 AM Taylor Huang wrote:
>
> anyone here?
>
> --
> You received this message because you are
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