Hi, I don't know what a modular group is but Python has some default
support for complex numbers (e.g., you can type in 1+2j in just your
standard Python interpreter and it will work), but all kinds of nice
things are available in Sage:
sage: z=1+2j
sage: type(z)
sage: C=ComplexField(256)
sage:
1. I would like to define a complex valued function
z -> f(z). For example f(z) = Im(z)^2. How do I define z so it is
represented as a complex float?
2. I would like to approximate a Poncare sum over the modular group.
Can you give me a reference for computing something like
\sum_{\gamma \in \G
On Jul 7, 3:52 pm, William Stein wrote:
> On Tue, Jul 7, 2009 at 12:29 PM, Ethan Van Andel wrote:
>
> > I am running some image generation stuff over the sagenb server. They
> > can take a LONG time (2.5 hours or more). I find that often when I
> > check on the process, it has been interupted w
On Tue, Jul 7, 2009 at 12:29 PM, Ethan Van Andel wrote:
>
> I am running some image generation stuff over the sagenb server. They
> can take a LONG time (2.5 hours or more). I find that often when I
> check on the process, it has been interupted with an error message
> like this:
>
> /home/sage/sa
On Tue, Jul 7, 2009 at 12:24 PM, Kevin Horton wrote:
>
> On 7 Jul 2009, at 14:47, William Stein wrote:
>
>> On Tue, Jul 7, 2009 at 3:04 AM, Robert
>> Bradshaw wrote:
>>>
>>> If
>>> two people are logged in under the same username, and trying to edit
>>> the same worksheet, things may get badly out
I don´t know if this applies.
But most of my worksheets in sagenb.org seem to have lost.
(or at least they don´t show nothing, I´m still not sure if it is a
new format or what)
I haven´t used it for a couple of months.
thanks
tincho
On Tue, Jul 7, 2009 at 3:38 PM, William Stein wrote:
>
> On T
I am running some image generation stuff over the sagenb server. They
can take a LONG time (2.5 hours or more). I find that often when I
check on the process, it has been interupted with an error message
like this:
/home/sage/sage_install/sage/local/bin/sage-sage: line 349: 3500
Killed
python "$
On 7 Jul 2009, at 14:47, William Stein wrote:
> On Tue, Jul 7, 2009 at 3:04 AM, Robert
> Bradshaw wrote:
>>
>> If
>> two people are logged in under the same username, and trying to edit
>> the same worksheet, things may get badly out of sync and funny stuff
>> might start to happen (i.e. concurre
On Tue, Jul 7, 2009 at 3:04 AM, Robert
Bradshaw wrote:
>
> On Jul 5, 2009, at 2:24 PM, Pablo wrote:
>
>> Hello,
>>
>> I have setup a sage notebook on a so that many colleagues can run on
>> it. It seems to work well but I still have two questions on the way it
>> works which where not answered by
On Tue, Jul 7, 2009 at 11:23 AM, Kevin Horton wrote:
>
> On 7 Jul 2009, at 13:27, William Stein wrote:
>
>> On Tue, Jul 7, 2009 at 10:19 AM, Kevin Horton
>> wrote:
>>>
>>> I'm using sage 4.0.2 on 32 bit ubuntu 8.10, via the notebook
>>> interface. If I delete a data file using the notebook (Data.
On 7 Jul 2009, at 13:27, William Stein wrote:
> On Tue, Jul 7, 2009 at 10:19 AM, Kevin Horton
> wrote:
>>
>> I'm using sage 4.0.2 on 32 bit ubuntu 8.10, via the notebook
>> interface. If I delete a data file using the notebook (Data... pop
>> up
>> menu -> file name -> delete file name link)
On Tue, Jul 7, 2009 at 10:19 AM, Kevin Horton wrote:
>
> I'm using sage 4.0.2 on 32 bit ubuntu 8.10, via the notebook
> interface. If I delete a data file using the notebook (Data... pop up
> menu -> file name -> delete file name link), the file is deleted, but
> the browser then goes to a blank
I'm using sage 4.0.2 on 32 bit ubuntu 8.10, via the notebook
interface. If I delete a data file using the notebook (Data... pop up
menu -> file name -> delete file name link), the file is deleted, but
the browser then goes to a blank page titled "Error | Sage Notebook".
The browser is Sa
I am looking for someone to help with my API. It is working rather
nicely, but I do not have "pretty_print" working. I have installed
JSmath in a plain html page and it works. I have put it in my server,
but when it trys to call a javasript other than load.js there is a
problem.
Does anyone ha
Yes, that's right. I got confused. Thanks for the quick answer!
Stan
Robert Bradshaw wrote:
> On Jul 7, 2009, at 2:18 AM, Stan Schymanski wrote:
>
>
>> Dear all,
>>
>> For some reason, I cannot generate lists of values using a symbolic
>> function any more, as the variable does not get sub
On Jul 5, 2009, at 2:24 PM, Pablo wrote:
> Hello,
>
> I have setup a sage notebook on a so that many colleagues can run on
> it. It seems to work well but I still have two questions on the way it
> works which where not answered by investigating the net :
> - how can I now if any user has connec
On Jul 6, 2009, at 2:21 PM, Mikie wrote:
> Yes, I am calling Scipy functions from a standard Python, thus no
> preparser. It does not recognize 1r, 10r, etc.
> Is there anyway to get it to work? I have also tried R, but r.binom
> does not work.
An example, including the error message, would be
On Jul 7, 2009, at 2:18 AM, Stan Schymanski wrote:
>
> Dear all,
>
> For some reason, I cannot generate lists of values using a symbolic
> function any more, as the variable does not get substituted.
Variables never get automatically substituted, you must explicitly
ask for it:
sage: var('x')
Dear all,
For some reason, I cannot generate lists of values using a symbolic
function any more, as the variable does not get substituted. The first
example shows that the values do not get substituted for x, the second
example shows that this works if I type the function into the list
constructi
Ok, i think i got what you suggested:
sage: alpha=symbolic_expression(x^2+x+1).roots
(ring=QQbar,multiplicities=False)
sage: K.=NumberField(x^2+x+1)
sage: R1.=K[]
sage: f=R1(x*y-a*y+x)
sage: H=K.hom([alpha[0]],QQbar)
sage: R2.=QQbar[]
sage: sum([H(i[0])*R2(str(i[1])) for i in list(f)])
x*y + x +
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