Hello,
When trying to build sage 4.3.2 on my DYI, highly customized linux
machine (everything seems to be within requirements, I will be happy
to provide any needed technical details) the compilation stops, after
many hours, with the following message:
sphinx-build -b html -d /usr/local/sage-4.3.
I was using Safari. What I mean by the "server stopped responding"
was that if I would type something into the notebook, it would just
hang up. When I tried to refresh the page I got an error message
saying that it couldn't reach that URL (I didn't save the exact
message).
Victor
On Feb 11, 12:
I'm pretty sure that Cornacchia's algorithm is part of Pari (though I
don't remember what the function is called).
Victor
On Feb 9, 5:54 am, Alasdair wrote:
> Do a google search on "Cornacchia's algorithm". Shouldn't be too hard
> to program in Sage (if it isn't there already).
>
> Alasdair
>
>
On Wed, Feb 10, 2010 at 9:34 PM, VictorMiller wrote:
> I've been running Sage 4.3.1 on my macbook pro. Today, the following
> happened twice:
>
> The notebook server stopped responding. When I looked at the console
> I had the following error on it:
>
> 2010-02-10 23:02:21-0500 [HTTPChannel,86,1
I've been running Sage 4.3.1 on my macbook pro. Today, the following
happened twice:
The notebook server stopped responding. When I looked at the console
I had the following error on it:
2010-02-10 23:02:21-0500 [HTTPChannel,86,127.0.0.1] /Applications/sage/
local/lib/python2.6/site-packages/tw
Hi,
While installing sage-4.3.2 from source on ubuntu 9.04, I got a
problem with termcap: "checking for string.h... eval: 1: Bad
substitution". Any ideas on
Full output error below:
Host system
uname -a:
Linux fnord 2.6.28-18-generic #59-Ubuntu SMP Thu Jan 28 01:23:03 UTC
2010 i686 GNU/Linux
***
3. I may, depending on how organized and motivated I am, try creating
new worksheets and converting some of my old notes for calculus to
worksheets. Currently, I'm using Stewart's "Calculus." I'd be happy
to make these available to anyone, but I'm wondering if their is an
appropriate namin
I have a couple questions about published worksheets on sagenb.org.
1. I'm curious how editing a published worksheet actually works. Let's take
Beezer's "Group Theory and SAGE: A Primer" as an example. This worksheet is
listed among the published worksheets. If I am logged into sagenb.org, c
Hello,
since I changed to version 4.3.2 it seems that calling associated_primes() on
an ideal of a polynomial ring that has term order 'invlex' is broken.
Example:
sage: R.=PolynomialRing(QQ,2,order='invlex')
sage: R.ideal(x).associated_primes()
? // Not implemented for this ordering, please cha
On Wed, Feb 10, 2010 at 8:50 AM, Walking Randomly
wrote:
> Regarding namespace pollution. Mathematica has thousands of function
> names in it's global namespace but it never causes programmers a
> problem because they have a convention. All mathematica functions
> start with a capital: Integrate
On Feb 10, 2:48 pm, Nathann Cohen wrote:
> I mentionned having to import simpy.*...
nonono, rsolve should be a new sage function, inside of it it only
imports the really necessary sympy classes. how is
integrate(algorithm='sympy') done? i think that's a good starting
point. see calculus/calculus.
Why do I keep getting the following message when attempting to log into the
Sage Notebook (sagenb.org)?
Please enable cookies or delete all Sage cookies and localhost cookies in your
browser and try again.
I deleted all of my cookies at the end of the day yesterday and just tried to
log into (
I think you always mean
from sympy import *
Don't get it confused with simpy, which is another software package for
simulation (versus symbolic computation).
On 02/10/2010 02:48 PM, Nathann Cohen wrote:
> I mentionned having to import simpy.*, which included classes like
> Symbol or Function, a
Regarding namespace pollution. Mathematica has thousands of function
names in it's global namespace but it never causes programmers a
problem because they have a convention. All mathematica functions
start with a capital: Integrate, Plot, ListPlot etc. So, stick to
lower case variables and you d
I mentionned having to import simpy.*, which included classes like
Symbol or Function, and having to use those types. I wouldn't
personally mind if I had to import rsolve from some Sage class... Why
should it necessarily imported by default (namespace kept clean)?
Nathann
--
To post to this grou
I should have said a couple more things. First, when integrand
evaluates to something other than the zero function (or, at least, to
a non-constant function), the original code
var('x,y,t')
F=vector([x^2,x*y])
r=vector([cos(t), sin(t)])
tstart=0
tend=2*pi
integrand = F(x=
I borrowed/adapted the following code for carrying out a line integral
from a published notebook
var('x,y,t')
F=vector([x^2,x*y])
r=vector([cos(t), sin(t)])
tstart=0
tend=2*pi
integrand = F(x=r[0], y=r[1])*diff(r,t)
As one may observe, integrand is identically 0. The idea
I don't usually work over such fields but it looks like a bug to me.
(y^3-y^2+1).quo_rem(x^2 + y^2 - 1) and (x^2+y^3).quo_rem(x^2 + y^2 -
1) both give the same answer for the remainder (-x^2*y + x^2 + y)
which I think is what the reduce method should be returning.
-Marshall Hampton
On Feb 9, 4:31
On Feb 10, 11:16 am, Simon King wrote:
> sage: f = y(n+2) - y(n+1) - y(n)
ahh ... ok. now i get it ^^
When I look into sympy/solvers/recurr.py right the first thing rsolve
does is to compute lhs - rhs. So, f = y(n) == y(n-1) - y(n-2) *should*
work. But it doesn't, because that equation doesn't ge
Hi Nathann,
On Wed, Feb 10, 2010 at 9:25 PM, Nathann Cohen wrote:
> Well, for example :
>
> - You need to import simpy to use it
One either directly import the functionalities of a third-party
package, or have them imported automatically at Sage startup. But
consider for a moment, the implicatio
Well, for example :
- You need to import simpy to use it
- For this reason, it does not appear in Sage's documentation
- It could be good to be able to define functions and variables as
they usually are in Sage and not through Simpy types
- Only define one function... I'd have enjoyed the ability
Hi Nathann!
Your were faster than I ... :-)
On Feb 10, 10:13 am, Nathann Cohen wrote:
> Their interface is a bit clumsy though, I admit... It could be good to
> be able to do it directly in Sage :-)
But how would a better interface look like?
I mean, you define a recurrence relation f, involvi
On Feb 10, 9:55 am, Harald Schilly wrote:
> > For example, how could I have Sage give me the general formula of
> > fibonacci's sequence ? :-)
>
> I wasn't able to do that one
Perhaps like that:
sage: from sympy import *
sage: y = Function('y')
sage: n = Symbol('n',integer=True)
sage: f = y(n+
sage: f = y(n+2) - y(n+1) - y(n)
sage: rsolve(f, y(n), { y(0):1, y(1):1 })
(1/2 + 5**(1/2)/2)**n/2 + (1/2 - 5**(1/2)/2)**n/2 - 5**(1/2)*(1/2 -
5**(1/2)/2)**n/10 + 5**(1/2)*(1/2 + 5**(1/2)/2)**n/10
That's perfect !! Thank you very much !! :-)
Their interface is a bit clumsy though, I admit... It c
Jason Grout writes:
>
>
> So which of your "if" conditions is true when the input is
> the variable x? I think that's the problem---none of the
> conditions is true, so angle is never set, so you are trying
> to return an undefined variable.
>
>
> The find_root function takes in just a function
On Feb 10, 9:54 am, Nathann Cohen wrote:
> I just learnt about the "rsolve" function from Maple, which seems to
> give the formula of sequences defined by recurrence.. Is there a
> similar function in Sage ?
sympy has rsolve
>
> For example, how could I have Sage give me the general formula of
>
Thank you ! :-)
Nathann
On 10 February 2010 09:58, Mike Hansen wrote:
> On Wed, Feb 10, 2010 at 12:54 AM, Nathann Cohen
> wrote:
>> Hello everybody
>>
>> I just learnt about the "rsolve" function from Maple, which seems to
>> give the formula of sequences defined by recurrence.. Is there
On Wed, Feb 10, 2010 at 12:54 AM, Nathann Cohen wrote:
> Hello everybody
>
> I just learnt about the "rsolve" function from Maple, which seems to
> give the formula of sequences defined by recurrence.. Is there a
> similar function in Sage ?
I don't believe there is anything in the Sage libr
Hello everybody
I just learnt about the "rsolve" function from Maple, which seems to
give the formula of sequences defined by recurrence.. Is there a
similar function in Sage ?
For example, how could I have Sage give me the general formula of
fibonacci's sequence ? :-)
Thank you very much !
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