I'm using sage 4.6.1 (release data 2011-01-11) on Linux.
When I tried to divide a vector of ~1 elements by a scalar, it ran out
of system memory and crashed.
code:
n = 1
v = vector([0]*n) # ok so far
v2 = v/1 # kaboom
I repeated this process for increasing values of n st
On Jun 5, 4:59 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> I really really really wish somebody would get all inspired and put some
> work into devel/sage/sage/plot/plot.py. It's really gone almost nowhere in
> the year and a half since Alex Clemesha stopped working on it. I do
> realize
I'm hearing some scary proposals in this thread, like crippling
symbolic processing, or introducing a whole new set of comparison
relations. At the same time I feel that the behaviour John is
describing is indeed confusing to newcomers and off-putting enough to
be worth doing something about. I be
thanks -- how do i get it to show the axis labels ("u" and "v")? and
better yet, could we fix things to make it do this automatically?
On May 30, 8:49 am, "David Joyner" <[EMAIL PROTECTED]> wrote:
> sage: u,v = var("u,v")
> sage: parametric_plot3d([u, v, 1-u-v], (u,-1, 1), (v,-1, 1))
>
> should w
On Jun 5, 2:24 pm, "Rhys Ulerich" <[EMAIL PROTECTED]> wrote:
> > this asymmetry between true and false seems bad. shouldn't "is_true(x)
> > == is_false(!x)" always be true?
>
> Depends on whether or not you're talking to a SQL person. I think
> is_true(x) == is_false(!x)
> should either be
nge your settings on sage-newbie, go to
> http://groups.google.com/group/sage-newbie/subscribe
> and fiddle with the settings. You could replace "newbie" by "forum" or
> whatever
> for other groups.
>
> ++
>
> On 9/8/07, Kyl
sorry for the spam, but how do i change my mailing list subscription to
receive a daily digest instead of the current individual mails? that used
to work well but the volume is too high now (esp. sage-devel)...
i can go to the web page for this google group, but it seems as if i can
only sign i
presumably you could do
if CC(x).imag() != 0:
# raise error
>
> Well I would like to make a Point class for a 2D coordinate system. So
> what is the best way to prevent most numbers with non-zero imaginary
> parts from becoming x and/or y in the definition of a given point
>
> On 4/23/07, David Joyner <[EMAIL PROTECTED]> wrote:
>>
>> On 4/23/07, didier deshommes <[EMAIL PROTECTED]> wrote:
>
>> matrix_from_rows_and_columns( )
>
> Thanks, I knew there was something I was missing. Any chance of
> aliasing this function to "submatrix()"? Because
> "matrix_from_rows_
>
> The above code is a good idea, but there would be efficiency
> issues. It would be better to do this (see the ev function below).
>
> sage: R1. = QQ['w']
> sage: R2. = R1['z']
> sage: f = w*z + (1-w)*z^3 + 3
> sage: def ev(f, a):
> ...return f.parent()([c(a) for c in f.list()])
> sage: e
>
> On 3/7/07, Kyle Schalm <[EMAIL PROTECTED]> wrote:
>
>> . the question is: how do i evaluate w while leaving z untouched?
>> (i actually want to do this when R1 is a multivariable ring, but i imagine
>> it works the same way.)
>>
>
> Can't y
i have a question about a polynomial ring over a polynomial ring. suppose
i have
R1. = QQ['w']
R2. = R1['z']
and i construct some sort of element,
f = z*w
i know that if i want to evaluate z, i can do something like
f(1) # output: w
and even
f(1)(5) # same as w(5)
. the question is:
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