Hi Robert,
On 28 Dez., 23:41, Robert Bradshaw
wrote:
> > According to your post, it should be "A group action G x S rightarrow
> > S is a functor from G (considered as a category) to the category of
> > Morphisms of Sets", and in the code it should be
> > Functor.__init__(self, Groupoid(G), S.cat
On Tue, Dec 28, 2010 at 6:46 PM, Aleksej Saushev wrote:
> John H Palmieri writes:
>
>> On Dec 22, 5:34 am, Cedric wrote:
>>> I love SAGE but then there is one flaw in it that I find one of the
>>> most severe in software-design of all. From my layman point of view
>>> (which I'm sure is wrong an
On Tue, Dec 28, 2010 at 8:38 PM, Rob Beezer wrote:
> sage: A=matrix(QQ,2,range(4))
> sage: B=matrix(ZZ,2,range(4))
> sage: C=A.echelon_form()
> sage: D=B.echelon_form()
> sage: C.is_mutable()
> True
> sage: D.is_mutable()
> False
>
> Should C and D be different with regard to mutability? If not,
sage: A=matrix(QQ,2,range(4))
sage: B=matrix(ZZ,2,range(4))
sage: C=A.echelon_form()
sage: D=B.echelon_form()
sage: C.is_mutable()
True
sage: D.is_mutable()
False
Should C and D be different with regard to mutability? If not, should
both results be immutable? (I'd rather not have to handle both
John H Palmieri writes:
> On Dec 22, 5:34 am, Cedric wrote:
>> I love SAGE but then there is one flaw in it that I find one of the
>> most severe in software-design of all. From my layman point of view
>> (which I'm sure is wrong and unjustified) a software that bundles
>> every single of its do
Hi,
Some long-running (~30 minutes) calculations I needed to do recently
in Sage working with a student inspired me to write a python
memoization library which uses Google App Engine to cache the output
of (decorated) functions. This means that if multiple people are
working on the same project th
On Tue, Dec 28, 2010 at 12:46 AM, Simon King wrote:
> Hi Robert,
>
> On 28 Dez., 01:27, Robert Bradshaw
> wrote:
>> ... You're working on
>> moving modules over to the new coercion framework, right?
>
> Yes.
>
>> > But how does one
>> > define an action? I guess that one is supposed to use
>> > s
Hi!
I guess further discussion should be moved to sage-algebra. See
http://groups.google.com/group/sage-algebra/browse_thread/thread/1787794a7a42cfb5
Cheers,
Simon
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> well, soon one should be able to solve semidefinite programming
> programs in Sage
> (I have a an interface with cvxopt almost done)
And Linear Programming as well as Integer Linear Programming are
already heavily used by graphs !
This used to belong to the numerical section, though it nowhas a
well, soon one should be able to solve semidefinite programming
programs in Sage
(I have a an interface with cvxopt almost done)
On Dec 28, 4:44 pm, Thierry Dumont wrote:
> Hi,
>
> With some other French Colleagues, we organize a "mini-symposium"
> about Sage at the Congress of the French Mathema
On 28 Dez., 09:46, Simon King wrote:
> Moreover, sage.matrix.action.MatrixMatrixAction is implemented by a
> _call_ method that has the signature
> cpdef Element _call_(self, g, s)
> Hence, essentially it is a map (not a functor) from GxS to S
... or actually from GxS to something into which S
Hi Robert,
On 28 Dez., 01:27, Robert Bradshaw
wrote:
> ... You're working on
> moving modules over to the new coercion framework, right?
Yes.
> > But how does one
> > define an action? I guess that one is supposed to use
> > sage.categories.action, but so far it has no example at all.
>
> http:
Hi,
With some other French Colleagues, we organize a "mini-symposium"
about Sage at the Congress of the French Mathematical Society in May
(see http://smai.emath.fr/smai2011/). There will be some short talks (30
mn) about Sage in different domains of Applied Maths, even in Industrial
fields.
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