Thanks. I might work on some sort of script, I suppose, because maple has an
"intersectplot" function, and that's definitely something I need for this
project.
How hard would it be to scan through the list of solutions to
"solve([nodalSet1,nodalSet2], [x,y,z], dict_solution=True)" and use
som
On Tue, Jul 12, 2011 at 10:37 PM, robin hankin wrote:
> OK so it's a bug in maxima. Quite a bad one, I'd say! The answer
> given by maxima is unequivocal, and wrong.
>
> What is the procedure for getting this fixed? Do I write to the
> maxima developers or is there a mechanism to upload such re
Hi again
[replying to self]
I didn't make myself clear here. What I meant to ask was, I think,
"Look, sage doesn't seem to know this fact about psi(). Does sage
store a list of known facts about the psi function anywhere?
Because, if it does, I would like to suggest that the following list
of
Thanks for the reply. In my particular instance, there are a lot of
constants, and the problem looks a bit difficult to automate. Here are
the specifics:
var('x1,x2,x3,x4,k,x,y,z', domain=RR)
# Definition of P = Im[(x1 + i x2)^k]
P(k, x1, x2, x3, x4) = (x1^2 + x2^2)^(k/2)*sin(k*arctan2(x2,x1))
#
On 07/12/2011 04:37 PM, robin hankin wrote:
> OK so it's a bug in maxima. Quite a bad one, I'd say! The answer
> given by maxima is unequivocal, and wrong.
>
> What is the procedure for getting this fixed? Do I write to the
> maxima developers or is there a mechanism to upload such reports
> fr
On 07/12/2011 06:11 PM, robin hankin wrote:
> Hi.
>
>
> The psi function is defined over the entire complex plane.
>
> But sage doesn't seem to know anything about its properties.
>
> For example, I happen to know that psi(1-z) == pi/tan(pi*z) + psi(z)
>
> So I would expect the following sage
Hi,
I know that sage has ultraspherical(n,a,x) implemented, however if a
is not a number, ultraspherical(n,a,x) returns the error:
NameError: name 'a' not defined
(even if I write a = var('a')). This, partly, flies in the face of the
fact that the Gegenbauer polynomials are functions of a.
Wors
Example; intersection of an elipsoid and sphere:
var('x,y,z')
solve([x^2 +y^2+z^2 ==1,x^2+y^2+2*z^2 ==1],[x,y,z])
#[[x == r1, y == -sqrt(-r1^2 + 1), z == 0], [x == r2, y == sqrt(-r2^2
+ 1), z == 0]]
var('r1')
p1=parametric_plot3d([r1,-sqrt(-r1^2 + 1),0],
(-1,1),thickness=10,color='red')
p2=paramet
Hi.
The psi function is defined over the entire complex plane.
But sage doesn't seem to know anything about its properties.
For example, I happen to know that psi(1-z) == pi/tan(pi*z) + psi(z)
So I would expect the following sage command:
sage: (psi(1-z)- psi(z)-pi/tan(pi*z)).full_simplify()
Hi everyone,
I'm new to SAGE, so I'm sorry if this is an amateur question, however
I've been trying to find the simplest way to plot the intersection of
two surfaces. The impression I'm under is that I "should" be able to
do this with implicit_plot3d and solve. More specifically, I have two
functi
OK so it's a bug in maxima. Quite a bad one, I'd say! The answer
given by maxima is unequivocal, and wrong.
What is the procedure for getting this fixed? Do I write to the
maxima developers or is there a mechanism to upload such reports
from the sage community?
Robin
On Tue, Jul 12, 2011 at 1
The way i'd expect it to work is not working as i'd expect.
sage: F.=GF(25)
sage: F2.
Display all 114 possibilities? (y or n)
sage: F2.=F.extension(x^12-a)
sage: F[b^4][b^6]
Univariate Quotient Polynomial Ring in a over Univariate Quotient Polynomial
Ring in a over Finite Field in a of size 5^2 w
I have a similar problem on Mac OS X 10.6 with Sage 4.6. I'm not
what's up either, but I've just been resorting to the notebook
interface when I want 3D graphics. Any help others may offer would be
appreciated.
Best,
Graham
On Jul 11, 2:17 pm, Jotace wrote:
> Hi all,
>
> I'm using sage 4.7 on ub
On 7/12/11 6:15 AM, Stan Schymanski wrote:
Dear all,
since I upgraded from 4.6 to 4.7 (I also moved from a Mac to Ubuntu),
I cannot use a 1-D numpy array in list_plot any more. Is this
intended, or is it a bug? It breaks backwards compatibility and I
don't see the rationale behind it.
In sear
I have written following Lattice Reduction Algorithm. However, it does not
work properly (does not matche with the LLL algorithm
implemented in Sage). It will be great for me if any one check the program.
# LLL Algorithm
M=matrix(ZZ,4,4,
[1,57,67,75,
3,4,98,98,
34,23,267,111,
6,134,125,68
])
``list_plot`` takes either a single list of data, a list of tuples,
or a dictionary and plots the corresponding points.
sage: list_plot(data.tolist())
A Ch
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Dear all,
since I upgraded from 4.6 to 4.7 (I also moved from a Mac to Ubuntu),
I cannot use a 1-D numpy array in list_plot any more. Is this
intended, or is it a bug? It breaks backwards compatibility and I
don't see the rationale behind it.
Here is an example (just copy and paste into a workshe
It seems that Maxima has problem here but mpmath has not:
sage: from mpmath import *
sage: mp.pretty=True
sage: quad(lambda x:(x^2)*exp(x)/(1+exp(x))^2,[-inf,+inf])
3.28986813369645
sage: n(pi^2/3)
3.28986813369645
A Ch
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