Hi @ppurka - thank you very much as I would never have thought of that! -
that certainly fixes the crashing problem - but I now have an even more
bizarre problem, which is that plot3d does literally nothing! I have
re-booted everything but it makes no difference. Here is my code:
s = 4
a=1/s
Sorry - at ease ...
If I name the plot PP or something then put just 'PP' in a different cell
from its definition, it shows up fine.
Thanks again for the help
Kind regards
Gary
On Wed, Apr 17, 2013 at 10:39 AM, GaryMak garymako...@googlemail.comwrote:
Hi @ppurka - thank you very much as I
OK I have now uncovered another weird sage-python problem. I think I should
be the go-to guy to wreck otherwise perfectly healthy code :).
If you try to use the function minimize() with the python function @ppurka
defined above then you get the error
TypeError: g() takes exactly 2 arguments (1
On 04/17/2013 07:05 PM, Gary McConnell wrote:
OK I have now uncovered another weird sage-python problem. I think I
should be the go-to guy to wreck otherwise perfectly healthy code :).
If you try to use the function minimize() with the python function
@ppurka defined above then you get the
Ah I see now that this is implicit in the docs example ... thank you ...
should we perhaps point that out explicitly, since the very same function
takes two rather different syntaxes? I am happy to write a small amendment
to the page.
On Wed, Apr 17, 2013 at 1:09 PM, P Purkayastha
On 2013-04-17, Michael Welsh yom...@yomcat.geek.nz wrote:
I have some GF(2) matrices that are incidence matrices of undirected graphs.
When I try to construct the graphs in sage, this happens:
sage: Graph(matrix(GF(2), [[1,0,1,1],[1,1,0,1],[0,1,1,0]]))
it's not even clear what two parallel
On 04/17/2013 07:16 PM, Gary McConnell wrote:
Ah I see now that this is implicit in the docs example ... thank you ...
should we perhaps point that out explicitly, since the very same
function takes two rather different syntaxes? I am happy to write a
small amendment to the page.
You are
On 04/17/2013 09:59 AM, kcrisman wrote:
ppurka, can you try the patch at #13355 to see if that helps in this case?
No, that doesn't work either. :(
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Hello everyone,
I must declare assume twice. First time, I get an unevalued form.
After the second assume, I get the fine result :
I use Sage 5.7
sage: forget () ; var('n')
n
sage: assume ((x1) and (x0)) ; limit (n*x^n*(1-x), n=oo) ; limit
(n*x^n*(1-x), n=oo)
-(x - 1)*limit(x^n*n, n,
On Wednesday, April 17, 2013 8:58:15 AM UTC-7, Francois Maltey wrote:
Hello everyone,
I must declare assume twice. First time, I get an unevalued form.
After the second assume, I get the fine result :
I use Sage 5.7
sage: forget () ; var('n')
n
sage: assume ((x1) and (x0))
Is
Hi, I am trying to work with polynomials in Finite Fields. We have to implement
the Extended Euclidean Algorithm for using it with Reed Solomon Codes.
This is what I am trying to do:
pre
m = 4
k = 7
n = 2^m-1
f.alpha = FiniteField(2^m); f
r(x) =
Dima,
Rows correspond to vertices and columns correspond to edges. This
matrix represents an undirected triangle with a double edge. I don't
understand why the graph __init__ requires a +1 and a -1 in each
column -- that describes a directed incidence matrix, and has no place
in undirected
Hi Andrea,
On 2013-04-17, Andrea Lazzarotto andrea.lazzaro...@gmail.com wrote:
Hi, I am trying to work with polynomials in Finite Fields. We have to
implement the Extended Euclidean Algorithm for using it with Reed Solomon
Codes.
...
Now my problem is that I would like to divide a by b and
Le mercredi 17 avril 2013 18:07:04 UTC+2, John H Palmieri a écrit :
On Wednesday, April 17, 2013 8:58:15 AM UTC-7, Francois Maltey wrote:
Hello everyone,
I must declare assume twice. First time, I get an unevalued form.
After the second assume, I get the fine result :
I use Sage 5.7
The computation of the genus of curves over the field with 2 elements
raises an error message for some small curves. I'm using a selfcompiled
Sage 5.8 on a 64 bit linux system:
{
sage: k.x,y=GF(2)[]
sage: f=y^10 + x^7 + x^3
sage: c=Curve(f)
sage: print c.genus()
On Wednesday, April 17, 2013 11:01:47 AM UTC-7, Maarten Derickx wrote:
Le mercredi 17 avril 2013 18:07:04 UTC+2, John H Palmieri a écrit :
On Wednesday, April 17, 2013 8:58:15 AM UTC-7, Francois Maltey wrote:
Hello everyone,
I must declare assume twice. First time, I get an
Thanks! Built from source and now it works.
So there is a bug in sage binary distributions? I took
sage-5.8-linux-64bit-ubuntu_10.04.4_lts-x86_64-Linux.tar.lzma,
and ubuntu is based on debian. It really may call ATLAS, but what its fault
might cause such behaviour?
On Friday, April 12, 2013
I am very keen to help - my problem is utter incompetence at following the
high-level instructions in the manual for developers. Also I am on the VM
and I cannot access the sage directories directly. Is there a way you could
send me a manual file that I could modify and send back to you? Sorry :(
On 17/04/2013, at 11:46 PM, Dima Pasechnik dimp...@gmail.com wrote:
sage: Graph(matrix(GF(2), [[1,0,1,1],[1,1,0,1],[0,1,1,0]]))
it's not even clear what two parallel edges should lead to. Should they
cancel each other?
No, they're just parallel. Maybe I should have said multigraphs. The
On Wed, Apr 17, 2013 at 11:55 AM, Sure a.a.m...@gmail.com wrote:
Thanks! Built from source and now it works.
So there is a bug in sage binary distributions? I took
sage-5.8-linux-64bit-ubuntu_10.04.4_lts-x86_64-Linux.tar.lzma,
and ubuntu is based on debian. It really may call ATLAS, but what
Hi,
The problem is that in fact you are *not* considering two polynomials:
[...]
Note that by saying
S(x) = ...
you define S as a symbolic function on a symbolic variable x, and if you
re-define x later, then the variable of S will still be symbolic, and
not belong to a
On 04/17/2013 08:19 PM, Peter Mueller wrote:
sage: k.x,y=GF(2)[]
sage: f=y^10 + x^7 + x^3
sage: c=Curve(f)
sage: print c.genus()
Confirmed. From the error message, looks like a problem in Singular.
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I have the equation Ax=b where all matrix entries and all entrie of vector
b are in GF(2). How I will be able to solve this linear system equation
over GF(2) in SAGE software?
--
-
MSc. Juan del Carmen Grados Vásquez
Laboratório
sage: A = random_matrix(GF(2), 1, 1)
sage: A.det()
1
sage: b = random_vector(GF(2), 1)
sage: %time x = A \ b
CPU times: user 1.61 s, sys: 0.06 s, total: 1.67 s
Wall time: 1.67 s
sage: A * x == b
True
On Wed, Apr 17, 2013 at 1:45 PM, Juan Grados juan...@gmail.com wrote:
I have the
I'm still having problems with worksheets getting lost. My older worksheets
seem to be in place. Sometimes it happens the same day, I write a worksheet in
the morning and in the evening it doesn't appear when I log in at home.
-d
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On 4/17/13 5:11 PM, Dan Aldrich wrote:
I'm still having problems with worksheets getting lost. My older worksheets
seem to be in place. Sometimes it happens the same day, I write a worksheet in
the morning and in the evening it doesn't appear when I log in at home.
Are you talking about
I use sagenb.org which redirects me to www.sagenb.org. I use my username/PW,
I've been using sage before the google/FB authentication. My username is
daldrich.
-d
On Apr 17, 2013, at 6:19 PM, Jason Grout jason-s...@creativetrax.com wrote:
Are you talking about sagenb.org? Which server are
On 4/17/13 5:26 PM, Dan Aldrich wrote:
I use sagenb.org which redirects me to www.sagenb.org. I use my username/PW,
I've been using sage before the google/FB authentication. My username is
daldrich.
Hmmm.
1. sagenb.org shouldn't redirect to www.sagenb.org. Do you mean
sagemath.org
OK, I just created a worksheet, foo1: http://www.sagenb.org/home/daldrich/47/
Been using sage for years now, I've never explicitly saved my worksheets. This
one I created, ran, then logged off. Logging back on, it was there so don't
think that's the problem.
There are lost worksheets, sorry
sagenb.org definitely redirects me to http://www.sagenb.org
-d
On Apr 17, 2013, at 6:19 PM, Jason Grout jason-s...@creativetrax.com wrote:
On 4/17/13 5:11 PM, Dan Aldrich wrote:
I'm still having problems with worksheets getting lost. My older worksheets
seem to be in place. Sometimes it
HI,
I sent Dan a tarball (off list) of his /home directory from the
notebook server, so he can investigate.
William
On Wed, Apr 17, 2013 at 3:58 PM, Dan Aldrich daldr...@earthlink.net wrote:
sagenb.org definitely redirects me to http://www.sagenb.org
-d
On Apr 17, 2013, at 6:19 PM, Jason
Hi Andrea,
On 2013-04-17, Andrea Lazzarotto andrea.lazzaro...@gmail.com wrote:
Note that by saying
S(x) = ...
you define S as a symbolic function on a symbolic variable x, and if you
re-define x later, then the variable of S will still be symbolic, and
not belong to a polynomial ring.
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