Hi Lisa,
On May 24, 7:46 pm, Lisa Berger rlb...@gmail.com wrote:
Is there a way for us to get SAGE to give us the elements of the Gal
group of a number field as automorphisms?
I think it works like this:
sage: P.x = QQ[]
sage: K.z = NumberField(x^3+x^1+1)
sage: G = K.galois_group(names='t')
PS:
On May 24, 7:46 pm, Lisa Berger rlb...@gmail.com wrote:
... Using the
galois_group(type=pari)---we get the Pari group. However, when we
use galois_group(), we get an error message.
I just noticed that you use the option type=pari. I don't know if
that used to work in the past (it is not
Hi all
I'm trying to exponentiate the small antisymmetric matrix (infinitesimal
rotation of angle x). Following the ideas of the thread «How does one
define a real variable», I try the following :
sage : var('x')
sage: assume(x,'real')
sage : X=matrix([ [0,1],[-1,0] ])
sage: R=exp(x*X)
Hi Laurent,
I don't know if this is the most elegant method, but one could
transform the matrix into a list, apply the simplification to the list
elements (Python list comprehension), and transform back into a 2x2
matrix:
sage: R.parent()([(t.real_part()+t.imag_part()).simplify_full() for
t in
sage: R.parent()([(t.real_part()+t.imag_part()).simplify_full() for
t in R.list()])
Workshop fine ! Many Thanks.
Can I be picky ? The following does not work :
sage: a=4
sage: a.parent()(a.list())
I quite understand why, and it has no importance for the problem I'm
currently
Hello,
On Tue, May 25, 2010 at 8:11 AM, Laurent moky.m...@gmail.com wrote:
By the way, the following works :
sage : a=R[0][0]
sage: (a.real_part()+a.imag_part()).simplify_full()
cos(x)
How can automatize it ? Is it a way to perform this simplification to each
element of the matrix at once
On May 25, 4:35 pm, Laurent moky.m...@gmail.com wrote:
Can I be picky ?
Sure, but I can be picky as well :D
The following does not work :
sage: a=4
4 is not a matrix.
Anyway, I guess Mike's suggestion is better (I wasn't aware of the
apply_map method).
Cheers,
Simon
--
To post to this
Hi,
I am also facing the same problem. I am using the Windows Vista OS and
the same version of the Virtual Box.
Also I am trying to install the version 4.3 of the sage virtual box
image
On opening the ovf file I find a lot of references to vmware.com as
follows
I have a sage program which involves a lot of calculations of the
form:
solve for x, Ax = b, where A is an integral matrix and x and b are
column vectors. A is an integer matrix, but the solution (if it
exists) for x might be rational. Actually I want more than this:
I want to also determine
Hi,
I'm trying to get a contour plot of the magnitude of a complex
function. Simple, non-complex things like
contour_plot(abs(x+y), (x, -3, 3), (y, -3, 3))
work as I expect in the 4.4.2 notebook interface. However, when I
change that to read
contour_plot(abs(x+I*y), (x, -3, 3), (y, -3, 3))
Hi,
I am trying to retrieve the xy coordinates of an implicit plot, but I
am having trouble. I am able to do this with regular 2d plots without
a problem like this:
p = plot(...)
for r in p:
X = numpy.array(r.xdata)
Y = numpy.array(r.ydata)
...
With an implicit plot I can retrieve
Tnx!
Just for others (and maybe for the manual):
import gzip
F = get_remote_file(http://abcathome.com/data/triples_sofar.gz;)
input_file = gzip.open(F, 'rb')
all_data = input_file.read()
Roland
On 24 mei, 21:58, Jason Grout jason-s...@creativetrax.com wrote:
On 05/24/2010 02:36 PM, Rolandb
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