It's a hard problem in general. I think making a LattE optional
package would help here. I have dim memories that perhaps Mike Hansen
tried to make one once...ah yes:
http://sage.math.washington.edu/home/mhansen/latte-1.2-mk-0.9.spkg
...but I'm not sure what shape that's in.
A good paper descr
On 05/03/2010 12:59 PM, Nathann Cohen wrote:
I'm sure of the best way. You could just write your own
little function that checks the conditions for each
(i,j) in a big rectangle. Also, you might be able to use Sage's
MixedIntegerLinearProgram functionality.
And here is how :
p = MixedIntegerLi
On Mon, May 3, 2010 at 1:21 PM, David Joyner wrote:
> On Mon, May 3, 2010 at 12:50 PM, Diego Ruano wrote:
>> Thank you David for your answer.
>>
>> What about getting a solution over the integers?
>
>
> I'm sure of the best way. You could just write your own
To correct myself, I meant to say "I
> I'm sure of the best way. You could just write your own
> little function that checks the conditions for each
> (i,j) in a big rectangle. Also, you might be able to use Sage's
> MixedIntegerLinearProgram functionality.
And here is how :
p = MixedIntegerLinearProgram()
x = p.new_variable()
p.add
Hi,
On Mon, May 3, 2010 at 11:17 PM, hamed akhavan
wrote:
> Please guide me, how can I do that in Sage?
These threads from sage-support [1] and sage-devel [2] might be relevant.
[1]
http://groups.google.com/group/sage-support/browse_thread/thread/aa3f2adb5c2befed/
[2]
http://groups.google
Diego,
On May 3, 9:48 am, Diego Ruano wrote:
> Hi,
>
> I have some computations that I used to run without problems in Sage
> 4.2 but they do not work anymore in Sage 4.4. I believe that I have
> problems when I use something different from 0,1,2, for the name
> of the vertices of a DiGraph.
There was another similar thread a few days ago, with a little more
information. It would actually not be difficult to get this working
naturally (famous last words).
There is quite an old ticket already out for this (#1975, see
http://trac.sagemath.org/sage_trac/ticket/1975).
John
On May 3, 9
On 05/03/2010 09:51 AM, Burcin Erocal wrote:
On Mon, 3 May 2010 10:18:42 -0400
David Joyner wrote:
I think Sage calls Maxima and Maxima is getting i (your variable)
and I (sqrt(-1)) mixed up. I guess this is a bug, but it might be
known already.
It's reported here:
http://trac.sagemath.org/
On 05/03/2010 11:48 AM, Diego Ruano wrote:
Hi,
I have some computations that I used to run without problems in Sage
4.2 but they do not work anymore in Sage 4.4. I believe that I have
problems when I use something different from 0,1,2, for the name
of the vertices of a DiGraph.
I get the sa
On Mon, May 3, 2010 at 12:50 PM, Diego Ruano wrote:
> Thank you David for your answer.
>
> What about getting a solution over the integers?
I'm sure of the best way. You could just write your own
little function that checks the conditions for each
(i,j) in a big rectangle. Also, you might be abl
Thank you David for your answer.
What about getting a solution over the integers?
David Joyner wrote:
> I think Sage calls Maxima and Maxima is getting i (your variable)
> and I (sqrt(-1)) mixed up. I guess this is a bug, but it might be
> known already.
>
> Anyway, using x's and y's might be saf
Hi,
I have some computations that I used to run without problems in Sage
4.2 but they do not work anymore in Sage 4.4. I believe that I have
problems when I use something different from 0,1,2, for the name
of the vertices of a DiGraph.
I get the same error in my laptop using the version for U
Hi,
On Mon, 03 May 2010 06:55:25 -0500
Jason Grout wrote:
> On 05/03/2010 06:45 AM, Simon King wrote:
> > Hi Maite,
> >
> > On May 3, 11:15 am, Maite Aranes wrote:
> >> Does sage use symbolic calculus if it has to compare two symbolic
> >> expressions inside an "if" clause?
> >
> > I don't know
On Mon, 3 May 2010 10:18:42 -0400
David Joyner wrote:
> I think Sage calls Maxima and Maxima is getting i (your variable)
> and I (sqrt(-1)) mixed up. I guess this is a bug, but it might be
> known already.
It's reported here:
http://trac.sagemath.org/sage_trac/ticket/6882
I'm hoping it will b
Hello,
On Mon, May 3, 2010 at 1:34 AM, Jeroen Demeyer wrote:
> I wonder if there is a way to make Sage compute with points on elliptic
> curves over rings which are not fields. I would like to use it for a
> very simple implementation of the ECM factoring algorithm for
> educational purposes. T
I think Sage calls Maxima and Maxima is getting i (your variable)
and I (sqrt(-1)) mixed up. I guess this is a bug, but it might be
known already.
Anyway, using x's and y's might be safer:
sage: x,y = var('x,y')
sage: ineqs = [2*x+9*y>= - 0, -5*x-7*y>=-5, 3*x-2*y>= -6]
sage: solve_ineq(ineqs,[x,y
Hello
I want to introduce a series of variables which are 2-dimensional
array (like M[i,j] in Mathematica software).
In order to complete my question, I gave an example, below:
I want to have a variable 2-D array like M that:
M[1,1]=1,
M[1,2]=3,
M[2,1]=4,
and then I want to solve an equation inc
Thanks for the very quick answers :)
> > I don't know much about the symbolic part of Sage, but I think that
> > punch line is that the evaluation of a symbolic expression to a
> > boolean returns False if it is not guaranteed to be True. In your
> > case, I could imagine that the symbolic sqrt(..
Hi,
I upgrade Sage from 4.4.1.rc0 to 4.4.1 release on Mac 10.6.4 x86-64
platform. Upgrade successful. When I run, it show following errors
--
| Sage Version 4.4.1, Release Date: 2010-05-02 |
| Type notebook(
On 05/03/2010 06:45 AM, Simon King wrote:
Hi Maite,
On May 3, 11:15 am, Maite Aranes wrote:
Does sage use symbolic calculus if it has to compare two symbolic
expressions inside an "if" clause?
I don't know much about the symbolic part of Sage, but I think that
punch line is that the evaluati
Hi Maite,
On May 3, 11:15 am, Maite Aranes wrote:
> Does sage use symbolic calculus if it has to compare two symbolic
> expressions inside an "if" clause?
I don't know much about the symbolic part of Sage, but I think that
punch line is that the evaluation of a symbolic expression to a
boolean r
Does sage use symbolic calculus if it has to compare two symbolic
expressions inside an "if" clause? I was expecting that this will be
the case and I would get an "exact" answer to my "symbolic question",
but a program I was running crashed when it failed in checking that
two symbolic expressions w
On May 3, 9:54 am, Harald Schilly wrote:
> far as i know ...
ok well, i just forgot to upload it ^^
but anyways, the filename was 4.3.5 and hence a 4.3.5 release of sage.
h
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Hi,
I would like to compute the solution of systems of inequalities over
the integers. I have used the command "solve", but the solution is
over the complex numbers.
Something like:
i, j = var('i,j')
sol=solve([2*i+9*j>= - 0, -5*i-7*j>=-5, 3*i-2*j>= -6], i,j)
sol
[[i == (-54/31), j == (12/31)],
Hello sage-support,
I wonder if there is a way to make Sage compute with points on elliptic
curves over rings which are not fields. I would like to use it for a
very simple implementation of the ECM factoring algorithm for
educational purposes. The obvious doesn't work:
On May 2, 9:52 pm, VictorMiller wrote:
> I just downloaded, what I thought, was SAGE 4.4 (I went to
> sagemath.org, download, and clicked on the server from Boston) for Mac
> OS X 64 bit intel.
I upload the binaries and regarding osx, i only replace them if there
is a newer version available. T
Hi all,
Is there a way to do extended complex arithmetic in Sage? I mean,
adding a constant infinity such that oo + a = oo, a*oo = oo for a !=
0, etc. For now, I just made a small class wrapping a standard
complex number, but I wouldn't be surprised if this was already in
Sage, and done in a mu
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