tebook.
>
> That's a little tedious if you have lots of worksheets lost in this
> way - it might be possible to restore all of them with a script, but
> I'm not sure exactly how to do that on sagenb.org.
>
> -Marshall Hampton
>
> On Aug 18, 9:26 am, bsdz wrote:
>
Hi
I just checked back at my workbooks on www.sagenb.org and found most
of my workbooks have had their content replaced with a single "e"
character.
Does anyone know how I can recover my workbooks?
Blair
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Hi,
Is anyone aware of an alternative to maxima's part function.
http://maxima.sourceforge.net/docs/manual/en/maxima_6.html#IDX182
It allows one to access any part of an algebraic expression using
various indexes. A list of indexes uniquely defines any part of an
expression such as a sum part o
I had the same problem. A workaround is to click the jsMath button in
the bottom right hand corner of your notebook and choose Options, then
set "Use native Unicode fonts" radio button.
On Feb 2, 1:34 pm, Kevin Loranger wrote:
> After I log into SAENB:
> It looks like jsMath failed to set up pro
Hi
Is it possible to create a Ring over an arbitrary set in Sage? I have
a Python class and would like my instances to form a Ring.
I read somewhere that the built-in sage.rings.integer.Integer class
inherits from the Element class to allow it to form a Ring. Is there a
simpler example anywhere?
Yes that works. Thanks!
On Dec 23, 3:59 pm, "Mike Hansen" wrote:
> Hi Blair,
>
> On Tue, Dec 23, 2008 at 7:43 AM, bsdz wrote:
>
> > Hi,
>
> > Is it possible to convert a SymbolicEquation into a MaximaElement
> > easily? The opposite to: -
>
>
Sorry that does not help. I need a way to cast from a SymbolicEquation
type to a MaximaElement type. Please see my post :)
On Dec 23, 3:55 pm, "John Cremona" wrote:
> 2008/12/23 bsdz :
>
>
>
> > Hi,
>
> > Is it possible to convert a SymbolicEquation into a M
Hi,
Is it possible to convert a SymbolicEquation into a MaximaElement
easily? The opposite to: -
maxima('x^2 + y^2 = 0').sage()
Something like this: -
x, y = var('x y')
b = x^2 + y^2 == 0
b.maxima()
I would like to do some manipulations on an equation by breaking it
down into terms and parts.
I think the Type Error is coming from your use of the round function.
If I run: -
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)
r=2*2*pi
Pole1=r*exp(I*2*pi/3)
Pole2=-r
Pole3=r*exp(-I*2*pi/3)
Ts=0.1
H = lambda p: (p^3)/((p-P
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
(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
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