On Sat, Apr 3, 2010 at 4:08 PM, Rob wrote:
> I've officially given up on ever getting VirtualBox to work properly
> on my netbook (I'm pretty sure it's just a memory issue), so I'd like
> to go back to the last VMware version (4.1.2, I guess).
>
> I can find where to find the source code for the o
On 04/19/2010 07:18 PM, Jason Grout wrote:
On 04/16/2010 05:41 AM, Bastian Weber wrote:
Hi,
what is the proper way to convert a sage matrix to a numpy 2d-array?
The obvious way, i.e.
a=np.array(matrix([3 4]))
produces a 0d-array (thus a.shape is an empty tuple) which is not what I
want.
On 04/16/2010 05:41 AM, Bastian Weber wrote:
Hi,
what is the proper way to convert a sage matrix to a numpy 2d-array?
The obvious way, i.e.
a=np.array(matrix([3 4]))
produces a 0d-array (thus a.shape is an empty tuple) which is not what I
want.
To answer your original question, I think if
On 04/19/2010 12:58 PM, Bastian Weber wrote:
The question is: Where should I have found the information about the
existence of .numpy? And where will the next one with that problem find
it? Is there something like the scipy cookbook for sage where this could
be added?
In Sage, you can use tab
On Apr 20, 12:25 am, Robert Bradshaw
wrote:
> On Apr 19, 2010, at 2:50 PM, wb wrote:
>
> > coming from C I'm confused about this behavior in assignment:
>
> Since you know C, it may make sense to think of lists as being similar
> to pointers.
>
that makes sense - I guess I was expecting lists
On Apr 19, 2010, at 2:50 PM, wb wrote:
coming from C I'm confused about this behavior in assignment:
Since you know C, it may make sense to think of lists as being similar
to pointers.
1) using only integers --
sage: a=2
sage: b=2
sage: b=b+a
sage: b
4
sag
Here is the way that I do this when I want copy vs reference for
lists.
>>> a = [1,2]
>>> b = a[:]
>>> b[0] = a[0] + b[0]
>>> b
[2, 2]
>>> a
[1, 2]
>>>
the a[:] does a copy of the list while a=b creates a reference. It is
a little hard to get used to at first.
On Apr 19, 2:50 pm, wb wrote:
> c
IT WORKED!!!
I just heard from the systems administrator, and the problem was,
indeed, the path to the gcc libraries. Everything works so far.
Thank you very much for your patience and prompt answer.
-Adrian.
On Apr 2, 1:58 pm, "Dr. David Kirkby" wrote:
> adrian wrote:
> > We did not compile s
coming from C I'm confused about this behavior in assignment:
1) using only integers --
sage: a=2
sage: b=2
sage: b=b+a
sage: b
4
sage: a
2
so (at least), after b=b+a, 'b' seems to have gotten its own instance,
however
2) using lists --
On Mon, Apr 19, 2010 at 11:52 AM, bb wrote:
> I get a runtime error, but just would expect infinity! Is there something
> wrong or any explanation?
This is because when you do 2^3^4^5 you are computing that number
exactly as an integer, and that number is definitely not infinity. If
you wanted t
bb schrieb:
sage: 2^3^4^5
---
RuntimeError Traceback (most recent call
last)
/home/bb/sage-4.3.5/ in ()
/home/bb/sage-4.3.5/local/lib/python2.6/site-packages/sage/rings/integer.so
in sage.r
sage: 2^3^4^5
---
RuntimeError Traceback (most recent call last)
/home/bb/sage-4.3.5/ in ()
/home/bb/sage-4.3.5/local/lib/python2.6/site-packages/sage/rings/integer.so
in sage.rings.integer.Inte
Looks like the rk function in Maxima doesn't try hard enough to
float-ify its argument. I haven't looked at the code, but
maybe rk can call COERCE-FLOAT-FUN to construct a
function to evaluate the expression. At least that would
bring it into line with other Maxima functions which
evaluate expressi
Hi!
On 19 Apr., 03:33, vdelecroix <20100.delecr...@gmail.com> wrote:
> My two attempts were the followings
> {{{
> sage: K. = PolynomialRing(QQ,'t')
> sage: A2 = QuotientRing(K, Ideal(t^2))
> sage: A3 = QuotientRing(K, Ideal(t^3))
> sage: P = A2(t^4 + 3*t + 1)
>
> }}}
>
> First method: try to coer
Hi Minh,
Minh Nguyen wrote:
>
>> (Where should I have looked in the documentation to find out by myself?,
>> Maybe there are more useful hints.)
>
> The numpy() method you are referring to is in the file
>
> SAGE_ROOT/devel/sage-main/sage/matrix/matrix_real_double_dense.pyx
Thanks for that hin
A3(list(P)) works here -- answering the easier of your two questions!
John Cremona
On Apr 19, 2:33 am, vdelecroix <20100.delecr...@gmail.com> wrote:
> Hello,
>
> I'm trying to implement an algorithm for factorization of bivariate
> polynomials. A step of the algorithm is Hensel lifting and I was
In python, assignment is a statement, not an expression (it has no
return value).
This is unlike many other programming languages, such as C:
if ( (r = result()) == 3) {
// do something with r
}
In python:
>>> (a = 10) + 2
File "", line 1
(a = 10) + 2
^
SyntaxError: invalid syntax
On Monday 19 April 2010, bb wrote:
> sage: x=[a=5, a+=5, a-=3, a*=5, a/=8]
This is really a question about Python syntax, but here's a way:
sage: a= 5
sage: x = [a,a+5,a-3,a/8]
Cheers,
Martin
--
name: Martin Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x8EF0DC99
_otr: 47F
bb schrieb:
sage: x=[a=5, a+=5, a-=3, a*=5, a/=8]
File "", line 1
x=[a=Integer(5), a+=Integer(5), a-=Integer(3), a*=Integer(5),
a/=Integer(8)]
^
SyntaxError: invalid syntax
sage: x=[1,2+5,3]
sage: x
[1, 7, 3]
sage: x=[a
sage: x=[a=5, a+=5, a-=3, a*=5, a/=8]
File "", line 1
x=[a=Integer(5), a+=Integer(5), a-=Integer(3), a*=Integer(5),
a/=Integer(8)]
^
SyntaxError: invalid syntax
sage: x=[1,2+5,3]
sage: x
[1, 7, 3]
sage: x=[a=1,2+5,3]
---
Hi all,
Technically, this is not a Sage problem, but I figured I would post it
here anyway since others might have run into the same problem, and I'm
also trying to solve the problem using some Sage/python trickery.
The problem concerns the use of symbolic constants such as pi in
numerical integr
Dear Dox,
I don't know that you can do it via Jmol, but perhaps via Tachyon.
sage: sage.plot.plot3d.tachyon?
I imagine that looking more in depth at the Tachyon documentation (not
just the result of the above command) might help you more. I am sorry
that I don't know the answer to this, though.
On 04/16/2010 03:46 PM, Alec Mihailovs wrote:
On Apr 16, 4:01 pm, Alexander Shyrokov wrote:
I have derived the equation, which looks like this:
((T - (E -T) *(H.dot(N) - T.dot(N))/(E - T).dot(N) - H) / S) == Mp
I'll take a look at it later. But in general, if you have a system of
linear equa
Alex Ghitza schrieb:
On Mon, 19 Apr 2010 13:09:34 +0200, bb wrote:
Tnx!
Is there any explanation why the magic ends with del ?
sage: del x
sage: x
---
NameError Traceback (most recent ca
On Mon, 19 Apr 2010 13:09:34 +0200, bb wrote:
> Tnx!
>
> Is there any explanation why the magic ends with del ?
>
> sage: del x
> sage: x
> ---
> NameError Traceback (most recent call last)
>
Thank you very much, it woks perfectly.
Samuele
2010/4/19 luisfe :
>
>
> On 19 abr, 12:07, "samuele.anni" wrote:
>> Hello,
>> I'm trying to implement an algorithm for complete my thesis work about
>> congruence between modular forms and Galois representation.
>> A step of the algorithm I am worki
Harald Schilly schrieb:
On Apr 19, 11:36 am, bb wrote:
There is magically declared a variable x, even after each reset()?
Is this a feature or a bug?
Short answer: feature ;)
(and there are also other magically declared variables, like RDF ...)
H
Tnx!
Is there any explanation
On 19 abr, 12:07, "samuele.anni" wrote:
> Hello,
> I'm trying to implement an algorithm for complete my thesis work about
> congruence between modular forms and Galois representation.
> A step of the algorithm I am working on consists in replacing a
> generator of the number field with a fixed v
Hello,
I'm trying to implement an algorithm for complete my thesis work about
congruence between modular forms and Galois representation.
A step of the algorithm I am working on consists in replacing a
generator of the number field with a fixed value obtained, clearly the
command substitute cannot
On Apr 19, 11:36 am, bb wrote:
> There is magically declared a variable x, even after each reset()?
>
> Is this a feature or a bug?
Short answer: feature ;)
(and there are also other magically declared variables, like RDF ...)
H
--
To post to this group, send email to sage-support@googlegroup
I have some problem with reset():
sage: reset()
sage: x
x
sage: a
---
NameError Traceback (most recent call last)
/home/bb/sage-4.3.5/local/lib/python2.6/site-packages/sage/all_cmdline.pyc
i
For the first time, I just tried using the "Undo" function on a
worksheet since I had messed something up. But all the revisions I
was offered, even those from a day ago, look the same as the current
version!
This is 4.3.5 running on a 64-bit ubuntu server.
I have found it very useful that my st
On Mon, Apr 19, 2010 at 12:15 AM, wb wrote:
> I've tried to do timing of simple 2D integrals using sage/mpmath vs.
> mathematica.
>
> Example:
>
> ===
> sage: version()
> 'Sage Version 4.3.3, Release Date: 2010-02-21'
>
> sage: %time quadgl(lambda x,
I've tried to do timing of simple 2D integrals using sage/mpmath vs.
mathematica.
Example:
===
sage: version()
'Sage Version 4.3.3, Release Date: 2010-02-21'
sage: %time quadgl(lambda x,y: sin(x)*cos(y)/(x**2+y**2+1),[-8, 10],
[-6,10])
CPU times: u
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