On Thu, 27 Oct 2016, Travis Scrimshaw wrote:
1 - the definition (as even given in the docstring) still makes full sense
if the matrices are not the same size or if they are not square. There does
not exist such a matrix P.
To compare: (meet-)pseudocomplemet is defined for (meet-)semilattices,
> On Oct 27, 2016, at 10:47, William Stein wrote:
>
> Just curious: what choice does magma (or maple or Mathematica etc) make
> regarding this?
Magma acts as follows, when the matrices are square, but different sizes, or
when one or both are non-square:
> M1:=Matrix(ZZ,2,2,[1,2,3,4]);
> M2:
On 27 October 2016 at 18:47, William Stein wrote:
> Just curious: what choice does magma (or maple or Mathematica etc) make
> regarding this?
Using Magma V2.22-3 I am not impressed:
> A:=Matrix([[1,2],[3,4]]);
> B:=Matrix([[1,2],[3,4]]);
> Parent(A);
Full Matrix Algebra of degree 2 over Integer
Mathematica doesn't seem to have such a function for checking similarity.
Maple returns false. I don't know for magma.
Best,
Travis
On Thursday, October 27, 2016 at 12:47:29 PM UTC-5, William wrote:
>
> Just curious: what choice does magma (or maple or Mathematica etc) make
> regarding this?
On 10/27/2016 12:21 PM, Travis Scrimshaw wrote:
> I am for BB because:
>
Both options have merit. If most people think we should have a
user-friendly error for a common mistake (mismatched dimensions), then
maybe it makes sense to add an ignore_dims (default: False) parameter
for the people who e
Just curious: what choice does magma (or maple or Mathematica etc) make
regarding this?
On Thursday, October 27, 2016, Dima Pasechnik wrote:
> AA
> (but make sure docs make sense after the change)
>
> On Thursday, October 27, 2016 at 4:21:02 PM UTC, Travis Scrimshaw wrote:
>>
>> I am for BB bec
AA
(but make sure docs make sense after the change)
On Thursday, October 27, 2016 at 4:21:02 PM UTC, Travis Scrimshaw wrote:
>
> I am for BB because:
>
> 1 - the definition (as even given in the docstring) still makes full sense
> if the matrices are not the same size or if they are not square. T
I am for BB because:
1 - the definition (as even given in the docstring) still makes full sense
if the matrices are not the same size or if they are not square. There does
not exist such a matrix P.
2 - It puts an unnecessary burden on the average user. They have to deal
with errors on a true/f
+1 on AA.
Florent
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On Thu, Oct 27, 2016 at 4:48 AM, Frédéric Chapoton wrote:
> Hello,
>
> on https://trac.sagemath.org/ticket/18505, we are trying to enhance the
> is_similar method of matrices.
>
> Because we cannot agree, we require your vote on the following matter:
>
> 1) When M.is_similar(N) is called and eithe
Agreed: AA.
On Oct 27, 2016 04:53, "Vincent Delecroix" <20100.delecr...@gmail.com>
wrote:
> me too: AA
>
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me too: AA
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Hello,
on https://trac.sagemath.org/ticket/18505, we are trying to enhance the
*is_similar* method of matrices.
Because we cannot agree, we require your vote on the following matter:
1) When M.is_similar(N) is called and either M or N is not square:
A) raise an helpful specific error message
B
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