Dear all,
Thanks a lot for your help. It looks like there is yet another useful
function going to be implemented in sage. Just to give an example
where quad is faster than GSL (sorry for the length):
sage: def insol1(epsilon,ecc,varpi,phi,lambd):
... S0=1368
... phirad=phi*pi/180.
..
PC Pentium4, Dual threading, Memory 2*256MB,
OS-Windows2000+Service Pack4
In time install SAGE I receive message:
WARNING! This SAGE install was built on a machine that supports instruction are
not available on this computer.
SAGE will likely fail with ILLEGAL INSTRUCTION errors!
The following
On Dec 8, 8:23 am, a1antonov antonov <[EMAIL PROTECTED]> wrote:
Hi,
> PC Pentium4, Dual threading, Memory 2*256MB,
> OS-Windows2000+Service Pack4
>
> In time install SAGE I receive message:
>
> WARNING! This SAGE install was built on a machine that supports instruction
> are not available on
Hi all! Please help me to replace variables:
I have this function:
H(p)=(p^3)/((p-Pole1)*(p-Pole2)*(p-Pole3))
where Pole1,Pole2,Pole3 - complex:
r=2*2*pi
Pole1=r*exp(I*2*pi/3)
Pole2=-r
Pole3=r*exp(-I*2*pi/3)
Ts=0.1
And I need to make a few replaces:
need to replace "p" with "(2/Ts)*(z-1)/(z+
(Sorry if this reply appears twice - 1st one disappeared?)
This worked for me: -
H, p, Pole1, Pole2, Pole3, Ts, z, f = var("H p Pole1 Pole2 Pole3 Ts z
f")
p = (2/Ts)*(z-1)/(z+1)
z = exp(I*2*pi*Ts*f)
H = (p^3)/((p-Pole1)*(p-Pole2)*(p-Pole3))
show(H)
The only difference is that I have declared th
Hi
I was wondering if it is possible in Sage (perhaps even Maxima) to
change the variable in an ODE or PDE algebraically. I have set up a
simple PDE with the following: -
x, t, k_1, k_2 = var("x t k_1 k_2")
y = function('y', x, t)
PDE = lambda f : k_1 * x^2 * diff(f,x,2) + diff(f,t) + k_2*(x*dif
Personally I don't see how
As a guess, for a substitution like you want to work, the following
much simpler computation
sage: t = var('t')
sage: x = function('x', t)
sage: y = function('y', x)
sage: diff(y,t)
diff(y(x(t)), t, 1)
should yield not diff(y(x(t)), t, 1) but perhaps something like
d
Hi,
I have a list of surfaces (btw: volatility surfaces), each of which
represented by a list of 3-Tuples (numbers),
I would like to visualize them in an animation showing a surface
evolving in time.
Any suggestions which tools I could use for this?
Thank you,
Georg
--~--~-~--~~-
The nicest looking solution I have found is to make frames with
tachyon and then animate the results with ffmpeg. I have meant to
create some how-to documentation for the things I have done so far but
I do not have the time right now, hopefully I will soon. The options
for ffmpeg are somewhat c
I am working in the Sage Notebook, I can reproduce the Taylor Series
example as is. The LaTeX works fine there.
I took the next line from the Sage reference book, from the Latex
printing support section:
\tan^{-1} x
The problem is that when I put it in the Notebook cell I get an error:
SyntaxE
This may work for you
html(r'\tan^{-1} x') or simply html(r'$\tan^
{-1} x$')
the r before ' stands for "raw string".
On Dec 8, 9:55 pm, acardh <[EMAIL PROTECTED]> wrote:
> I am working in the Sage Notebook, I can reproduce the Taylor Series
> example as is. The LaTeX works fine there.
>
> I t
11 matches
Mail list logo
