On Tue, Dec 04, 2012 at 08:00:57PM -0800, Andrew Mathas wrote:
Thanks Nicolas. I appreciate your efforts in putting the category
framework in place! It's beginning to grow on me:)
:-)
Depending how far my explorations go I may end up adding some of
the missing pieces...
You
- Matrices with rows and columns indexed by whatever objects
I have a (very) rough prototype for this as it is one of the things that I
need. Rather than matrices, however, I am thinking of making the underlying
object just an array/table as for my applications the full matrix is often
On 2012-12-05, Andrew Mathas andrew.mat...@sydney.edu.au wrote:
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- Matrices with rows and columns indexed by whatever objects
I have a (very) rough prototype for this as it is one of the things that I
huh?
sage: m=matrix([[1,2],[3,4]])
sage: m
[1 2]
[3 4]
sage: m[1,1]=100
sage: m
[ 1 2]
[ 3 100]
sage:
Yes, you're right. My issue with matrices is that I can't write something
like:
sage: matrix([[1,0],[None,0]])
(Unless, of course, you want to correct me again:)
A.
Dear facade lovers,
I just upload on trac a patch about the initialisation of facade sets
at #13801. One of the smallest patch I never write... which corrects
two errors.
Please, send comments.
Best,
Vincent
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Hello,
I do not understand the purpose of sage.sets.disjoint_set (which
moreover has nothing to do with disjoint set) ! As far as I understand
it is a duplicate of set partitions with some special features. Am I
right ?
Best,
Vincent
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Hey Andrew,
It sounds more like you want to use a spare matrix (or even just a
dictionary with a tuple as the key) and fill in entries as you compute them.
Best,
Travis
On Wednesday, December 5, 2012 3:29:27 AM UTC-8, Andrew Mathas wrote:
huh?
sage: m=matrix([[1,2],[3,4]])
sage: m
Here's a related question: suppose I have an object G in sage. Is there a
correct way to ask G if is it a CombinatorialFreeModule? I can check for
if hasattr(G,'_basis_keys'): ...
but I would have thought that there was a better way to do this...
Andrew
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On 2012-12-05, Andrew Mathas andrew.mat...@sydney.edu.au wrote:
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Here's a related question: suppose I have an object G in sage. Is there a
correct way to ask G if is it a CombinatorialFreeModule? I can check
Yes, I worked it out and deleted my question bot before you replied it
seems.
Thanks anyway,
Andrew
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On Thu, Dec 06, 2012 at 01:13:09AM +, Dima Pasechnik wrote:
Here's a related question: suppose I have an object G in sage. Is there a
correct way to ask G if is it a CombinatorialFreeModule? I can check for
if hasattr(G,'_basis_keys'): ...
but I would have thought that there was a
I wonder if one can actually work in the endomorphism ring/algebra of a
CombinatorialFreeModule, and if yes, how.
Examples most appreciated.
(Ideally, I would like to know how to work with algebras specified by
multiplication coefficients in this framework)
Thanks,
Dima
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Hey everyone,
What is the reason why facade=True is allowable by Parent? It seems like
we always want to pass in the parent(s) which our facade parent is acting
for.
Best,
Travis
On Wednesday, December 5, 2012 8:23:01 AM UTC-8, Vincent Delecroix wrote:
Dear facade lovers,
I just
An example in sage.sets.finite_enumerated_set. But an example is not
an explanation ;-)
2012/12/6 Travis Scrimshaw tsc...@ucdavis.edu:
What is the reason why facade=True is allowable by Parent? It seems like
we always want to pass in the parent(s) which our facade parent is acting
for.
On
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