Hi Andrea,
On 2013-04-17, Andrea Lazzarotto 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.
>>
>
> Ok, my bad
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 wrote:
> sagenb.org definitely redirects me to http://www.sagenb.org
>
> -d
>
> On Apr 17, 2013, at 6:19 PM, Jason Grout wrote:
>
>>
sagenb.org definitely redirects me to http://www.sagenb.org
-d
On Apr 17, 2013, at 6:19 PM, Jason Grout 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 happens the same day, I wr
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 bu
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 redirect
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 wrote:
> Are you talking about sagenb.org? Which server are you using? What
> authentic
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 sagen
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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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 wrote:
> I have the equation Ax=b where
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
On 04/17/2013 08:19 PM, Peter Mueller wrote:
sage: k.=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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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 p
On Wed, Apr 17, 2013 at 11:55 AM, Sure 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 its fault
> migh
On 17/04/2013, at 11:46 PM, Dima Pasechnik 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 example
abo
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 :( I
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 1:25
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. Firs
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.=GF(2)[]
sage: f=y^10 + x^7 + x^3
sage: c=Curve(f)
sage: print c.genus()
--
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 :
Hi Andrea,
On 2013-04-17, Andrea Lazzarotto 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 get bot the quotient
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 graph
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:
m = 4
k = 7
n = 2^m-1
f. = FiniteField(2^m); f
r(x) =
1+alpha*x+alpha^2*x^2+x^3+x^4+x^5+x^6+x^7+x^8+alpha^3*x^
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 ((x<1) and
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 ((x<1) and (x>0)) ; limit (n*x^n*(1-x), n=oo) ; limit
(n*x^n*(1-x), n=oo)
-(x - 1)*limit(x^n*n, n, +I
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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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 welcom
On 2013-04-17, Michael Welsh 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 edges should lead t
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 wrote:
> On 0
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 error
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 gi
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 wrote:
> Hi @ppurka - thank you very much as I would never have thought o
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
b=
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