I don't see any concrete reason why is_true(x) and is_false(!x) must
be identical... we've already lost a sane definition of equality in
many ways if floating point numbers are involved, so keeping it this
way isn't going to make it any worse.
On Thu, Jun 5, 2008 at 5:28 PM, Kyle Schalm <[EMAIL P
On Thu, Jun 5, 2008 at 4:59 PM, William Stein <[EMAIL PROTECTED]> wrote:
>
> On Thu, Jun 5, 2008 at 4:53 PM, David Joyner <[EMAIL PROTECTED]> wrote:
>>
>> I don't know if this can be done automatically but axes labels can be
>> set using the axes_labels method described on the page
>> http://www.s
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
On Thu, Jun 5, 2008 at 4:53 PM, David Joyner <[EMAIL PROTECTED]> wrote:
>
> I don't know if this can be done automatically but axes labels can be
> set using the axes_labels method described on the page
> http://www.sagemath.org/doc/html/ref/module-sage.plot.plot.html
> (a little over 1/2 way down
I don't know if this can be done automatically but axes labels can be
set using the axes_labels method described on the page
http://www.sagemath.org/doc/html/ref/module-sage.plot.plot.html
(a little over 1/2 way down the page).
On Thu, Jun 5, 2008 at 7:05 PM, Kyle Schalm <[EMAIL PROTECTED]> wrot
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
>
> 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 true or inconclusive.
- Rhys
--~--~-~--~~~---
> >> I'm not sure what to do if the user requests a comparison that
> >> sage can't easily determine:
>
> >> sage: sqrt(3) + sqrt(8) == sqrt(5) + pi
>
> >> One idea would be to return a symbolic equation
>
> >> sqrt(3) + sqrt(8) === sqrt(5) + pi
>
> >> but probably the best is to raise an except
On Thu, Jun 5, 2008 at 10:22 AM, Martin Albrecht
<[EMAIL PROTECTED]> wrote:
> Stas, I guess I'll have to build from source but I'm forwarding your e-mail to
> [sage-support] where it has a better chance of being answered properly.
We don't yet support gentoo for Sage. You have to build from sour
Stas, I guess I'll have to build from source but I'm forwarding your e-mail to
[sage-support] where it has a better chance of being answered properly.
Cheers,
Martin
-- Forwarded Message --
Subject: SAGE installation
Date: Thursday 05 June 2008
From: Stanislav Bulygin ...
To:
Hello,
This message is to announce Sage Days 10 in France in October!
Sage days 10 in Nancy (France) Announcement
===
http://wiki.sagemath.org/days10
October 10 to 15, 2008 at the Lorraine Laboratory of IT Research
and its Applications (L
I finally got it (sage) to work on the asus. Here are some random comments.
1. A lot of preporatory work was done on my ubuntu desktop.
For example, the sd card is mounted as root and typically formatted
as vfat. I reformatted
as ext2. Also, for copying, I didn't use the command line (even with
Sorry Cesar, I have no idea. I almost never use the notebook but use
the command line instead.
Maybe someone on sage-support can help (I'm cc'ing them).
On Thu, Jun 5, 2008 at 8:45 AM, Cesar Agustin Garcia Vazquez
<[EMAIL PROTECTED]> wrote:
> Why do I get the following error when I start using t
Thanks a lot, that should work. I will have to do the symbolic
derivations first and then convert the results into python functions
before doing numerical computations.
Cheers
Stan
On Jun 5, 1:23 pm, Marshall Hampton <[EMAIL PROTECTED]> wrote:
> Here is a somewhat different solution that you mig
Here is a somewhat different solution that you might like more:
sage: var('x,a,b')
sage: def f(x):
return 2*x^a + b
sage: f(x)
2*x^a + b
sage: a = 2; f(x)
2*x^2 + b
sage: b = 1; f(x)
2*x^2 + 1
The fact that f is a python function instead of a SymbolicArithmetic
object has both ad
Dear Robert,
Thanks a lot for the quick solution. That's a whole new support
experience!
I was hoping I could define
z=y.subs(locals())
so that z would automatically adapt if the local variables change, but
it does not. Every time I change the local variables, I have to
redefine z=y.subs(locals(
On Jun 5, 2008, at 2:34 AM, Stan wrote:
> Dear all,
>
> I would like to use Sage as an alternative to Mathematica and I am
> quite amazed about the demonstrated functionality of Sage. I just have
> a very basic problem with the way I am used to do calculations. Often,
> I define a set of equation
Dear all,
I would like to use Sage as an alternative to Mathematica and I am
quite amazed about the demonstrated functionality of Sage. I just have
a very basic problem with the way I am used to do calculations. Often,
I define a set of equations with different variables in them, then I
solve the
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