Carlos Córdoba a écrit :
> Hi,
>
> I know this is not a general mathematical forum, but I hope you can help me.
> I have this PDE:
>
> \frac{dB}{dt} = F(x,y,z)B(x,y,z) - G(x,y,z)\nabla B(x,y,z)
>
> and I don't know how to solve it numerically. What would be the easiest
> method to do it? It can
On Fri, Dec 18, 2009 at 9:35 PM, Christopher Olah
wrote:
> I'm not sure I understand. Why can't you just use ${IP ADDRESS}:8000 ?
> You'll probably need to port-forward, but that is easy enough...
The notebook only listens on localhost by default. Use
sage: notebook(address="")
to listen on
I'm not sure I understand. Why can't you just use ${IP ADDRESS}:8000 ?
You'll probably need to port-forward, but that is easy enough...
On Fri, Dec 18, 2009 at 6:09 PM, Robert Bradshaw
wrote:
> On Dec 18, 2009, at 2:53 PM, rvaug...@gmail.com wrote:
>
>> On a newly-installed instance of Sage, one
Hi,
I know this is not a general mathematical forum, but I hope you can help me.
I have this PDE:
\frac{dB}{dt} = F(x,y,z)B(x,y,z) - G(x,y,z)\nabla B(x,y,z)
and I don't know how to solve it numerically. What would be the easiest
method to do it? It can be in python, but preferably in C++.
Thank
On Fri, Dec 18, 2009 at 11:28 AM, William Stein wrote:
> On Fri, Dec 18, 2009 at 10:19 AM, Stefan wrote:
>> Hey guys,
>>
>> Is there any way to disable the auto-login feature when a user
>> accesses the Notebook server from the machine? Since I'm hosting the
>> notebook server in a VM and have a
On Dec 18, 2009, at 2:53 PM, rvaug...@gmail.com wrote:
> On a newly-installed instance of Sage, one of my users ssh's in and
> runs "sage".
> He gets this:
>
> sage: notebook()
> which returned:
> Open your web browser to http://localhost:8000
>
> There must be some incantation for starti
On a newly-installed instance of Sage, one of my users ssh's in and
runs "sage".
He gets this:
sage: notebook()
which returned:
Open your web browser to http://localhost:8000
There must be some incantation for starting a sage server that can be
connected
to over the web remotely from
On Dec 18, 11:30 am, William Stein wrote:
> Hi,
>
> So the main issue is that often some of the hard drives aren't
> appearing after import, due to bugs in VirtualBox on various
> platforms?
>
> [...]
>
> William
To be fair to your efforts William, I'm not sure they have the new
appliance you e
On Dec 18, 2009, at 11:28 AM, William Stein wrote:
> On Fri, Dec 18, 2009 at 10:19 AM, Stefan
> wrote:
>> Hey guys,
>>
>> Is there any way to disable the auto-login feature when a user
>> accesses the Notebook server from the machine? Since I'm hosting the
>> notebook server in a VM and have a
Two options I can think of, probably a lot more from the elders here:
1) turn off verbose
set_verbose(-1)
f(x) = x^(1/3)
plot(f(x),(-5,5))
2) Don't plot negative
f(x) = x^(1/3)
plot(f(x),(0,5))
-d
At 09:55 AM 12/18/2009, you wrote:
>Why when I want t
On Fri, Dec 18, 2009 at 11:58 AM, Stefan wrote:
> Hi Robert,
>
> Thanks for getting back to me. The error I'm getting is:
>
> File "/sage/sage/local/lib/python2.6/site-packages/sagenb/simple/
> twist.py", line 207, in render
> U = notebook_twist.notebook.user(username)
> exceptions.AttributeError
Hi Robert,
Thanks for getting back to me. The error I'm getting is:
File "/sage/sage/local/lib/python2.6/site-packages/sagenb/simple/
twist.py", line 207, in render
U = notebook_twist.notebook.user(username)
exceptions.AttributeError: 'NoneType' object has no attribute 'user'
On Dec 18, 2:17 pm
On Fri, Dec 18, 2009 at 9:17 AM, Stefan wrote:
> Oh boy. I had a bunch of problems with getting the VirtualBox
> appliance to work in Windows 7.
>
> When you import the appliance, prior to starting it, go into the
> configuration and look at the hard drive configuration. The
> configuration shou
On Fri, Dec 18, 2009 at 10:19 AM, Stefan wrote:
> Hey guys,
>
> Is there any way to disable the auto-login feature when a user
> accesses the Notebook server from the machine? Since I'm hosting the
> notebook server in a VM and have an outside port forwarded to the VM,
> any users that access the
On Dec 18, 2009, at 10:19 AM, Stefan wrote:
> Hey guys,
>
> Is there any way to disable the auto-login feature when a user
> accesses the Notebook server from the machine? Since I'm hosting the
> notebook server in a VM and have an outside port forwarded to the VM,
> any users that access the ser
On Dec 18, 2009, at 8:53 AM, Stefan wrote:
> Hi all,
>
> I surfed through the discussion board and through the documentation on
> trying to figure out how to get the simple server API up and running.
> I made sure to run 'import sage.server.simple.twist' in my sage
> prompt. Is there a way to eas
Hi,
I've created a poset of permutation elements using the Bruhat partial
order:
bruhat_p_order = lambda p,q : p.bruhat_lequal(q)
my_poset = Poset([perms, bruhat_p_order])
It seems that when I create the poset, the elements are no longer
permutations but "PosetElement"s, and I can't figure out h
On Dec 18, 9:55 am, Hobus wrote:
> Why when I want to graph f=x^(1/3) I get the following error?
> In this case, what should I do to get the complete graph?
>
> sage: plot(x^(1/3),x,-1,1)
>
> verbose 0 (2999: plot.py, generate_plot_points) WARNING: When
> plotting,
> failed to evaluate function
Hey guys,
Is there any way to disable the auto-login feature when a user
accesses the Notebook server from the machine? Since I'm hosting the
notebook server in a VM and have an outside port forwarded to the VM,
any users that access the server globally get logged in as admin.
Thanks!
--
To po
I am using the latex in Moodle and I had Moodle's latex filter turned
on. I removed it and the fonts are great. Before it was creating an
image.
On Dec 18, 2:22 am, "ma...@mendelu.cz" wrote:
> I think that better is to use scalable fonts. this should be default
> in modern distribution. What ex
Ok. I've found a way (to copy an fft object) :
lfft = len(fftobj)
fftobj_copy = FFT(lfft)
for i in range(lfft):
fftobj_copy[i]=fftobj[i]
If you see things which I could / should do another way in my code,
feel free to post your suggestions!
On Dec 18, 11:45 am, Maxim wrote:
Oh boy. I had a bunch of problems with getting the VirtualBox
appliance to work in Windows 7.
When you import the appliance, prior to starting it, go into the
configuration and look at the hard drive configuration. The
configuration should be reference the three files that comes with the
Sage p
Hi all,
I surfed through the discussion board and through the documentation on
trying to figure out how to get the simple server API up and running.
I made sure to run 'import sage.server.simple.twist' in my sage
prompt. Is there a way to easily test Sage to see if the API is
functioning such as
Hello!
I am working with the builtin FFT Fast Fourier Transform of Sagemath,
and have coded (based on the work of P. Lutus here :
http://vps.arachnoid.com/sage/fourier.html) a function that takes an
fftobject to plot the spectrum of a function.
My problem is that when I pass the fftobject, I don'
Why when I want to graph f=x^(1/3) I get the following error?
In this case, what should I do to get the complete graph?
sage: plot(x^(1/3),x,-1,1)
verbose 0 (2999: plot.py, generate_plot_points) WARNING: When
plotting,
failed to evaluate function at 100 points.
verbose 0 (2999: plot.py, genera
I think that better is to use scalable fonts. this should be default
in modern distribution. What exactly you have installed? texlive? from
where, from texlive homepage or from centos repository?
Try to compile you ps into PDF (using ps2pdf), open PDF document, go
to the document - properties and
Are you talking about the postscript files produced by dvips?
You probably only installed a small subset of fonts, and scaling them
produces substandard results. It can also be that dvips is set up to
create 300 DPI (dots per inch) docs - this is easy to fix then (but
depends upon a particular setu
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