On Nov 4, 2009, at 7:43 PM, wxu...@sohu.com wrote:
>
> Hi, all
>
>
> I just saw that if I defined a function: f=f(e^t),
How did you define f? Perhaps
> the f.diff(f,t) will give e^t*D[0](f)(e^t). and the
>
> question is what is the meaning of D[0](f)(e^t)?
>
> I can find that in the help of dif
Hi, all
I just saw that if I defined a function: f=f(e^t),
the f.diff(f,t) will give e^t*D[0](f)(e^t). and the
question is what is the meaning of D[0](f)(e^t)?
I can find that in the help of diff().
thanks in advance.
--~--~-~--~~~---~--~~
To post to this g
On Nov 4, 2009, at 3:01 PM, Michael Orlitzky wrote:
> Simon King wrote:
>> Hi Michael!
>>
>> On 4 Nov., 20:55, Michael Orlitzky wrote:
>> [...]
it starts using floating point numbers internally.
>>> I didn't tell it to do that.
>>
>> You did. 0.5 is a floating point number.
>
> I guess it c
On Nov 4, 2009, at 7:27 PM, Adam Sorkin wrote:
>
> I am trying to load a Gap package for braid orbit computations. I
> would like to run everything through Sage if possible. This is an
> undeposited Implementation, so running "sage -i gap_packages-4.4.10_4
> " doesn't retrieve this package. I'm
I am trying to load a Gap package for braid orbit computations. I
would like to run everything through Sage if possible. This is an
undeposited Implementation, so running "sage -i gap_packages-4.4.10_4
" doesn't retrieve this package. I'm running this on OSX, 10.5, and
have gap_version() = 4.4.10
Thanks than I'll try that from now on :)
On Wed, Nov 4, 2009 at 9:05 PM, Dan Drake wrote:
> On Wed, 04 Nov 2009 at 01:10PM -0200, Lucio Lastra wrote:
> > Is there any difference if the Sage 4.2 Karmic release runs on Ubuntu
> > Jaunty?
> >
> > I mean, do certain features fail or something alike
Dan Drake wrote:
> On Wed, 04 Nov 2009 at 04:07PM -0800, Simon King wrote:
>> Hi Dan!
>>
>> On 5 Nov., 00:15, Dan Drake wrote:
>> ...
>>> There's a space between "eigenvalues" and "()". Python (and hence Sage)
>>> gets confused by that. Use A.eigenvalues() with no spaces.
>> No, that's not true.
Hi all:
I found some strange behavior in solve that's related to function
composition. Check out this short example.
--
| Sage Version 4.2, Release Date: 2009-10-24 |
| Type notebook() for the GUI, and l
On Wed, 04 Nov 2009 at 04:07PM -0800, Simon King wrote:
>
> Hi Dan!
>
> On 5 Nov., 00:15, Dan Drake wrote:
> ...
> > There's a space between "eigenvalues" and "()". Python (and hence Sage)
> > gets confused by that. Use A.eigenvalues() with no spaces.
>
> No, that's not true. On sage.math, it w
Simon King wrote:
> Hi Dan!
>
> On 5 Nov., 00:15, Dan Drake wrote:
> ...
>> There's a space between "eigenvalues" and "()". Python (and hence Sage)
>> gets confused by that. Use A.eigenvalues() with no spaces.
>
> No, that's not true. On sage.math, it works with the additional space.
> sage:
Hi Dan!
On 5 Nov., 00:15, Dan Drake wrote:
...
> There's a space between "eigenvalues" and "()". Python (and hence Sage)
> gets confused by that. Use A.eigenvalues() with no spaces.
No, that's not true. On sage.math, it works with the additional space.
sage: A = matrix([[0, 4], [-1, 0]])
sa
On Wed, 04 Nov 2009 at 01:30PM -0800, q wrote:
> sage: A = matrix([[0, 4], [-1, 0]])
> sage: A.eigenvalues ()
There's a space between "eigenvalues" and "()". Python (and hence Sage)
gets confused by that. Use A.eigenvalues() with no spaces.
Dan
--
--- Dan Drake
- http://mathsci.kaist.ac.k
On Wed, 04 Nov 2009 at 04:54PM +, Johann Myrkraverk Oskarsson wrote:
> I've been trying to google for documentation on what is available in a
> html cell in a sage notebook. And I find nothing. Is there such a doc
> anywhere?
We use TinyMCE, whose documentation is here:
http://tinymce.moxiecod
On Wed, 04 Nov 2009 at 01:10PM -0200, Lucio Lastra wrote:
> Is there any difference if the Sage 4.2 Karmic release runs on Ubuntu
> Jaunty?
>
> I mean, do certain features fail or something alike or everything should run
> fine as always?
I would run "make test" or "make ptest" and see for yourse
Michael Orlitzky wrote:
> Jason Grout wrote:
>> I think there are several points here:
>>
>> 1. The moment Sage sees a decimal, it starts using approximate, floating
>> point arithmetic. If you don't want that, then don't use decimals; use
>> fractions. This is consistent with most mathematica
Simon King wrote:
> Hi Michael!
>
> On 4 Nov., 20:55, Michael Orlitzky wrote:
> [...]
>>> it starts using floating point numbers internally.
>> I didn't tell it to do that.
>
> You did. 0.5 is a floating point number.
I guess it comes down to that, when I say 0.3 I mean 0.3, and SAGE
assumes
Hi Michael!
On 4 Nov., 20:55, Michael Orlitzky wrote:
[...]
> > it starts using floating point numbers internally.
>
> I didn't tell it to do that.
You did. 0.5 is a floating point number.
> Ok, but (assuming it can be done) how do you propose I convert my
> problem to an exact field? By hand?
Well, I've resolved these issues while trying to get a different
application to work. In the unlikely event that someone else has the
same problem, it seems I somehow removed my own write permissions to
my home directory. (Very strange on a brand-new machine...) With
that fixed (by doing "get i
Jason Grout wrote:
>
> I think there are several points here:
>
> 1. The moment Sage sees a decimal, it starts using approximate, floating
> point arithmetic. If you don't want that, then don't use decimals; use
> fractions. This is consistent with most mathematical software (though
> other
Michael Orlitzky wrote:
>> It's messy the instant you type it in with decimal points
>
> Not the end user's fault.
>
>
>> it starts using floating point numbers internally.
>
> I didn't tell it to do that.
>
I think there are several points here:
1. The moment Sage sees a decimal, it star
On 5/11/2009, at 10:30 AM, q wrote:
> Can someone please explain this to me?
Works fine for me -
sage: A = matrix([[0, 4], [-1, 0]])
sage: A
[ 0 4]
[-1 0]
sage: A.eigenvalues
sage: A.eigenvalues()
[-2*I, 2*I]
>
> I'm using Ubuntu 9.04, sage version 3.0.5 which I installed from the
> synapti
I was trying to find the eigenvalues of a matrix.
I tried the example from the tutorial (http://www.sagemath.org/doc/
tutorial/tour_linalg.html):
sage: A = matrix([[0, 4], [-1, 0]])
sage: A.eigenvalues ()
And I got this error:
"AttributeError: 'sage.matrix.matrix_integer_dense.Matrix_integer_de
[ma...@um-bc107 /opt/sage]$ ./sage
--
| Sage Version 4.1.2, Release Date: 2009-10-13 |
| Type notebook() for the GUI, and license() for information.|
--
On Nov 4, 2009, at 11:25 AM, Michael Orlitzky wrote:
> Robert Bradshaw wrote:
>>
>> I'd also like to point out that we don't just want to fall back and
>> do
>> everything over the rationals (even though any finite decimal
>> expansion is rational) as things get much slower due to coefficient
>
Robert Bradshaw wrote:
>
>
> Technically, your matrix does not contain integer multiples of 0.1, it
> contains approximations to integer multiples of 0.1, represented base
> 2, truncated to 53 bits of precision.
>
> sage: (0.1).exact_rational()
> 3602879701896397/36028797018963968
>
> As yo
On Nov 4, 2009, at 11:08 AM, Michael Orlitzky wrote:
>
> Jason Grout wrote:
>>
>> I don't think it's an issue of irrational versus rational. It's
>> numerical precision and inexact floating point numbers. This
>> matrix is
>> terribly ill-conditioned. It is right on the border line between
Robert Bradshaw wrote:
>
> I'd also like to point out that we don't just want to fall back and do
> everything over the rationals (even though any finite decimal
> expansion is rational) as things get much slower due to coefficient
> explosion. For example
Who cares about speed when the ans
Hi,
My calculus is a bit rusty, and I'm trying to do the following.
sage: x,a = var("x a")
sage: sinc(x) = sin(pi*x)/(pi*x)
sage: L = sinc(x)*sinc(x/3)
sage: L
3*sin(1/3*pi*x)*sin(pi*x)/(pi^2*x^2)
sage: L.integrate(x)
3*integrate(sin(1/3*pi*x)*sin(pi*x)/x^2, x)/pi^2
...which doesn't help me m
Jason Grout wrote:
>
> I don't think it's an issue of irrational versus rational. It's
> numerical precision and inexact floating point numbers. This matrix is
> terribly ill-conditioned. It is right on the border line between being
> invertible or not, numerically speaking:
No, it isn't.
On 4 lis, 17:54, "Johann \"Myrkraverk\" Oskarsson"
wrote:
> Hi all,
>
> I've been trying to google for documentation on what is available in a
> html cell in a sage notebook. And I find nothing. Is there such a doc
> anywhere?
The TinyMCE in Sage is quite recent - (I guess no more than 1 year
ol
On Wed, Nov 4, 2009 at 10:51 AM, Lucio Lastra wrote:
> Hi all,
>
> I was trying to fix the Illegal instruction error as described here:
>
> http://wiki.sagemath.org/faq#Otherquestions
>
> typing:
>
> rm spkg/installed/mpir* spkg/installed/atlas*
> make
>
> but got an error and attached the log.
>
Hello all,
I had (have) some minor troubles running sage under OS X 10.6, that I
thought I would report here:
A) The installation instructions don't make sense. In particular, the
following paragraph in sage-README-osx.txt doesn't appear to
correspond to reality. (Probably it did in a previous
Hi all,
I've been trying to google for documentation on what is available in a
html cell in a sage notebook. And I find nothing. Is there such a doc
anywhere?
I do know that I can use latex commands to render mathematics. There
does not seem to be any list of what kind of latex commands are
avai
Thanks a lot ! It works now.
On 4 nov, 13:18, Marshall Hampton wrote:
> I changed your Kohl function to:
>
> def Kohl(t,b):
> return n(exp(-(exp(t*ln(10.0))/T_sol)**b))
>
> and things worked on sagenb. I don't completely understand what's
> going on though, seems like a bug in find_fit in c
Willian, I found it. In /local/bin/
On Nov 4, 9:26 am, William Stein wrote:
> On Wed, Nov 4, 2009 at 8:24 AM, Mikie wrote:
>
> > Willian, Thanks, I found it. How do I start it.
>
> Type
>
> ./sage -maxima
>
> from the root of your Sage install.
>
> -- william
>
>
>
>
>
>
>
> > On Nov 4,
Flavio Coelho wrote:
> Thanks for the pointer,
>
> but randstate.pyx, which allows one to choose between differents RNGs,
> offers the built-in python RNG as a python object.
>
> on line 561 it does a
> import random
> rand = random.Random()
> return rand
>
> What I am looking for is a way to c
On Wed, Nov 4, 2009 at 8:24 AM, Mikie wrote:
>
> Willian, Thanks, I found it. How do I start it.
Type
./sage -maxima
from the root of your Sage install.
-- william
>
> On Nov 4, 8:35 am, William Stein wrote:
>> On Wed, Nov 4, 2009 at 7:22 AM, Mikie wrote:
>>
>> > Is the Maxima that Sa
Willian, Thanks, I found it. How do I start it.
On Nov 4, 8:35 am, William Stein wrote:
> On Wed, Nov 4, 2009 at 7:22 AM, Mikie wrote:
>
> > Is the Maxima that Sage uses a full version?
>
> Yes
>
> > Where is Maxima in the
> > Sage directory? Can I load Maxima and do some command line work?
>
On Wed, Nov 4, 2009 at 7:10 AM, Lucio Lastra wrote:
> Hi all,
>
> Is there any difference if the Sage 4.2 Karmic release runs on Ubuntu
> Jaunty?
>
> I mean, do certain features fail or something alike or everything should run
> fine as always?
Sage should work perfectly on both 9.04 and 9.10.
On Wed, Nov 4, 2009 at 7:22 AM, Mikie wrote:
>
> Is the Maxima that Sage uses a full version?
Yes
> Where is Maxima in the
> Sage directory? Can I load Maxima and do some command line work?
sage -maxima
> Thanx
> >
>
--
William Stein
Associate Professor of Mathematics
University of Washi
There are several ways to do this.
sage: maxima_console()
gives you a fully functioning version of Maxima, just as if you
downloaded it yourself.
Or you can use Maxima one thing at a time:
sage: from sage.calculus.calculus import maxima
sage: maxima.eval('integrate(cos(x),x)')
'sin(x)'
Usuall
Is the Maxima that Sage uses a full version? Where is Maxima in the
Sage directory? Can I load Maxima and do some command line work?
Thanx
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Hi all,
Is there any difference if the Sage 4.2 Karmic release runs on Ubuntu
Jaunty?
I mean, do certain features fail or something alike or everything should run
fine as always?
Greetings,
Lucio
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To post to this group, send email to sage-su
I changed your Kohl function to:
def Kohl(t,b):
return n(exp(-(exp(t*ln(10.0))/T_sol)**b))
and things worked on sagenb. I don't completely understand what's
going on though, seems like a bug in find_fit in converting things to
numpy types. While it shouldn't have to be this way, I have fo
On Wed, 4 Nov 2009 03:30:24 -0800 (PST)
"cchristy...@gmail.com" wrote:
> B_sol=find_fit(f1_data, Kohl, parameters = [Beta], variables = [t],
> initial_guess = [0.3], solution_dict = True)[Beta]
>
> where Kohl is a python function :
>
> var("Beta")
> def Kohl(t,Beta):
>return n(exp(-(exp(t*
That's strange, the page published #924 isn't mine any more.. Here is
mine : http://www.sagenb.org/home/pub/931/
If it disappears again, the problem comes from this line :
B_sol=find_fit(f1_data, Kohl, parameters = [Beta], variables = [t],
initial_guess = [0.3], solution_dict = True)[Beta]
whe
Thanks for the pointer,
but randstate.pyx, which allows one to choose between differents RNGs,
offers the built-in python RNG as a python object.
on line 561 it does a
import random
rand = random.Random()
return rand
What I am looking for is a way to call the C function behind
random.random dir
Hi,
On Tue, 3 Nov 2009 12:42:47 -0800 (PST)
"cchristy...@gmail.com" wrote:
> Since I have compiled the new version of sage, 'Sage Version 4.1.2,
> Release Date: 2009-10-14' , the find_fit function of my programs don't
> want to work any more.
>
> The error message is :
> /sage/sage/local/bin/s
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