On Thursday 02 April 2009, Christophe Oosterlynck wrote:
Hi,
is it possible to calculate the echelon form of matrices containing
polynomials over GF(2)? I'm getting the following error:
NotImplementedError: echelon form over Univariate Polynomial Ring in x
over Finite Field of size 2
Martin Albrecht wrote:
On Thursday 02 April 2009, Christophe Oosterlynck wrote:
Hi,
is it possible to calculate the echelon form of matrices containing
polynomials over GF(2)? I'm getting the following error:
NotImplementedError: echelon form over Univariate Polynomial Ring in x
over
On Thu, Apr 2, 2009 at 4:42 AM, Jason Grout jason-s...@creativetrax.com wrote:
Martin Albrecht wrote:
On Thursday 02 April 2009, Christophe Oosterlynck wrote:
Hi,
is it possible to calculate the echelon form of matrices containing
polynomials over GF(2)? I'm getting the following error:
On Apr 2, 2009, at 8:59 AM, William Stein wrote:
On Thu, Apr 2, 2009 at 4:42 AM, Jason Grout jason-
s...@creativetrax.com wrote:
Martin Albrecht wrote:
On Thursday 02 April 2009, Christophe Oosterlynck wrote:
Hi,
is it possible to calculate the echelon form of matrices containing
On Thu, Apr 2, 2009 at 10:54 AM, Robert Bradshaw
rober...@math.washington.edu wrote:
On Apr 2, 2009, at 8:59 AM, William Stein wrote:
On Thu, Apr 2, 2009 at 4:42 AM, Jason Grout jason-
s...@creativetrax.com wrote:
Martin Albrecht wrote:
On Thursday 02 April 2009, Christophe Oosterlynck
Incidentally, doing everything with floats would I
think be *very* inappropriate for an undergrad class in linear
algebra, where most of the by hand problems require the students to
use rational numbers.
Yes, which is why he only uses Octave for half the semester, I think,
or something like
kcrisman wrote:
Incidentally, doing everything with floats would I
think be *very* inappropriate for an undergrad class in linear
algebra, where most of the by hand problems require the students to
use rational numbers.
Yes, which is why he only uses Octave for half the semester, I
On Thu, Apr 2, 2009 at 6:23 PM, Jason Grout jason-s...@creativetrax.com wrote:
kcrisman wrote:
Incidentally, doing everything with floats would I
think be *very* inappropriate for an undergrad class in linear
algebra, where most of the by hand problems require the students to
use rational
William Stein wrote:
On Thu, Apr 2, 2009 at 6:23 PM, Jason Grout jason-s...@creativetrax.com
wrote:
kcrisman wrote:
Incidentally, doing everything with floats would I
think be *very* inappropriate for an undergrad class in linear
algebra, where most of the by hand problems require the
Ok I understand!!
I just did the exercise in the pari console.
? A=[0,0,0; 0,0,0; 0,0,0]
%3 =
[0 0 0]
[0 0 0]
[0 0 0]
? mathnf(A)
%4 = [;]
So pari is a bit brain damaged and represents the empty matrix by
[;]!!!
This should be special cased in the parsing routines.
William: I assume it is
Here is a patch that fixes this. Perhaps there is a better way to do
it.
http://emis.uhasselt.be/sage_patches/zero_matrix_echelon_form_bug.patch
Michel
On Jun 2, 10:01 am, Michel [EMAIL PROTECTED] wrote:
Ok I understand!!
I just did the exercise in the pari console.
? A=[0,0,0; 0,0,0;
On 6/1/07, Thea Gegenberg [EMAIL PROTECTED] wrote:
The method echelon_form gives me an error when I try to take the
echelon form of a zero matrix. It says TypeError: entries has the
wrong length
Here's an example to illustrate the bug. I hope somebody will
fix it and send me a patch :-).
No patch but I can tell you were there is something obviously wrong.
The matrix H on line 1056 in matrix_integer_dense.pyx should
be the empty matrix (perhaps []?) but it is something like ['',''].
The computation
for adding the missing zero rows goes wrong after that.
Michel
On Jun 1, 9:34
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