Hi,
Using Windows 7, Virtualbox, Sage 4.7 I got the following message:
socket.error
Last listings:
429 os.chdir(cwd)
430 if e == 256:
431raise socket.error
What to do?
Roland
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Hi.
What's going on here?
y=(x^2)*exp(x)/(1+exp(x))^2
integrate(y,(x,-infinity,infinity))
0
Sage gives me zero here.
But 'y' is strictly positive everywhere, and I happen to know
that the analytic answer is pi^2/3.
What's going on here?
--
Robin Hankin
Uncertainty Analyst
hankin.ro.
Suppose that I have field (it's actually a finite field, but it would
be nice to know if this works in more generality) F, and an extension
field K. If a[0], ..., a[k] are elements of K, I'd like to generate
the field F obtained by adjoining these elements to F as a sage
object. Is there a method
Hi all,
I'm using sage 4.7 on ubuntu 11.04, and I am having problems with
3dplots, but this happens only with the notebook interface. 2D plots
are
o.k. in both modes, and 3d plots from the terminal work fine, so jmol
is
there.
Whe trying to do a 3d plot, a black square appears in my browser.
In
On Mon, Jul 11, 2011 at 9:43 AM, robin hankin wrote:
> Hi.
>
> When I type
>
> integrate(dirac_delta(x),x,-1,1)
>
>
> I expected to get 1, as the documentation clearly implies.
>
> But instead I get a symbolic answer.
>
> How do I make sage return 1?
>
>
>
>
> cheers
>
> Robin
>
>
> --
> Robin Han
On Mon, Jul 11, 2011 at 10:30 AM, Pedro Cruz wrote:
> Good morning,
>
> the command
> integrate( abs(x^2-1), x, -2,2)
> does not do the job automatically.
>
> I have seen on this discussion group another, at least, similar
> message.
>
> Is there an organized list of functions that are yet impl
Good morning,
the command
integrate( abs(x^2-1), x, -2,2)
does not do the job automatically.
I have seen on this discussion group another, at least, similar
message.
Is there an organized list of functions that are yet implemented for
integration? How can one cooperate without being a sage p
