On Sat, 7 Sep 2013 15:25:26 +0300
Georgi Guninski gunin...@guninski.com wrote:
snip
btw, I get:
'sage.rings.complex_interval.ComplexIntervalFieldElement' object has
no attribute 'cot'
when trying your |check| on this:
-arctan(cot(pi*x))/pi + 1/2 #fractional part of x
This is now #15179:
On Wed, 4 Sep 2013 10:28:05 -0700 (PDT)
kcrisman kcris...@gmail.com wrote:
On Wednesday, September 4, 2013 1:01:07 PM UTC-4, Peter Luschny wrote:
Recently two integration test suites were discussed at
sci.math.symbolic [1], [2].
I executed the tests with Sage and put the results on my
On Tue, 27 Aug 2013 11:11:35 -0700 (PDT)
Emmanuel Charpentier emanuel.charpent...@gmail.com wrote:
Dear Burcin, dear list
Le mardi 27 août 2013 11:16:18 UTC+2, Burcin Erocal a écrit :
On Sat, 24 Aug 2013 14:16:01 -0700 (PDT)
Emmanuel Charpentier emanuel.c...@gmail.com javascript: wrote
On Sat, 24 Aug 2013 14:16:01 -0700 (PDT)
Emmanuel Charpentier emanuel.charpent...@gmail.com wrote:
Dear list,
Setup : sage 5.11 on Debian amd64 self-compiled (Debian's compilers
and tuned Atlas library)
trying to put on paper the elementary proof that the convolution of
two normals is a
On Thu, 25 Jul 2013 11:10:42 -0700
William Stein wst...@gmail.com wrote:
On Thu, Jul 25, 2013 at 9:16 AM, Victor Miller
victorsmil...@gmail.com wrote:
In the latest version of sage (at least what cloud.sagemath.org is
running),
... which is sage-5.10, the latest released version.
On Mon, 24 Jun 2013 11:36:58 -0700 (PDT)
Emmanuel Charpentier emanuel.charpent...@gmail.com wrote:
Le jeudi 13 juin 2013 16:54:50 UTC+2, Stephen Nuchia a écrit :
I think the reason for it is probably because Sage variables are so
often words rather than letters When using LaTeX
On Tue, 11 Jun 2013 00:02:45 -0700 (PDT)
Asad Akhlaq assad.akh...@gmail.com wrote:
I am also trying to use Sage's built in 'taylor' command and it is
also very slow.
Try the .series() method of symbolic expressions. It should be faster.
Cheers,
Burcin
--
You received this message because
On Thu, 10 Jan 2013 03:09:05 -0800 (PST)
LFS lfahlb...@gmail.com wrote:
Hiya, Probably I am just doing something wrong ...
I have a cubic polynomial p(x) with regular coefficients and I
wanted coefficients around e.g. (x-1). So I did p1=p.taylor(x,1,3).
I get:
x |-- 0.085*(x - 1)^3 -
On Tue, 27 Nov 2012 11:23:01 +0100
Serge Torres serge.tor...@laposte.net wrote:
I'm pretty sure this question has been answered over and over but
despite intensive googling I could not find these answers.
I have expressions (say, f = exp(x)) that want to export to another
computing system.
On Tue, 27 Nov 2012 12:16:20 +0100
Burcin Erocal bur...@erocal.org wrote:
On Tue, 27 Nov 2012 11:23:01 +0100
Serge Torres serge.tor...@laposte.net wrote:
I'm pretty sure this question has been answered over and over but
despite intensive googling I could not find these answers.
I
On Mon, 19 Nov 2012 23:25:34 -0800
Justin C. Walker jus...@mac.com wrote:
On Nov 19, 2012, at 22:36 , Jan Groenewald wrote:
On 16 September 2012 08:08, Robert Dodier robert.dod...@gmail.com
wrote:
On 2012-09-16, kcrisman kcris...@gmail.com wrote:
Either that was a regression
On Tue, 20 Nov 2012 09:25:21 +0100
Burcin Erocal bur...@erocal.org wrote:
On Mon, 19 Nov 2012 23:25:34 -0800
Justin C. Walker jus...@mac.com wrote:
On Nov 19, 2012, at 22:36 , Jan Groenewald wrote:
On 16 September 2012 08:08, Robert Dodier
robert.dod...@gmail.com wrote
Hi Christian,
On Fri, 29 Jun 2012 00:10:32 -0700 (PDT)
Christian Stump christian.st...@gmail.com wrote:
I want to do some computations with multivariate polynomials in the group W
of type H4 (14400 elements). I have a summand for every element w \in W,
and a product of 4 polynomials in each
On Mon, 20 Feb 2012 10:39:11 -0500
Michael Orlitzky mich...@orlitzky.com wrote:
On 02/19/12 19:58, Mike wrote:
When I run:
x,y=var('x,y', domain=RR)
solve(2.0*x+3.0*y==4.0, y)
I get
[y == -2/3*x + 4/3]
but I would like to get
[y == -0.666*x +
On Feb 8, 10:38 pm, ObsessiveMathsFreak
obsessivemathsfr...@gmail.com wrote:
I have a certain integration result which Sage is currently unaware
of. I need a way to make sage aware of it in some fashion, via
substitution or anything else.
For example, sage currently cannot perform the
Hi Oscar,
On Tue, 7 Feb 2012 00:08:04 -0800 (PST)
Oscar Lazo algebraicame...@gmail.com wrote:
Done:
http://trac.sagemath.org/sage_trac/ticket/12455
Thanks!
I've added a patch, which should do the job, but it has a few
shortcomings:
1.-The resulting symbolic functions seem to remain on
On Tue, 7 Feb 2012 06:56:30 -0800 (PST)
Oscar Lazo algebraicame...@gmail.com wrote:
On 7 feb, 04:48, Burcin Erocal bur...@erocal.org wrote:
I don't think we want to have separate functions for the
derivatives in Sage. These might help you get around the printing
problem for now
On Tue, 29 Nov 2011 13:14:36 -0700
jrodri1...@gmail.com wrote:
Hi! I'm working with an expression involving imaginary exponentials
and their conjugates:
exp(i•k•x)
exp(i•k•x)*=exp(-i•k•x)
However, when multiplying them together, I do not get the arguments
to evaluate to zero. My
On Sun, 23 Oct 2011 15:09:09 -0700 (PDT)
Simon King simon.k...@uni-jena.de wrote:
On 23 Okt., 23:18, David Joyner wdjoy...@gmail.com wrote:
On Sun, Oct 23, 2011 at 4:51 PM, Avril Coghlan
avril.cogh...@googlemail.com wrote:
Dear all,
I am new to SAGE (since today) but am excited
On 10/10/2011 20:13, Christian Burisch wrote:
Hi All,
William Stein referred me into here.
I am working on a project analysing a function that uses
multidimensional generalisations of complex numbers. A bit like
cyclotomic fields, but where the unity roots are not complex
numbers
Hi Chris,
On Sun, 18 Sep 2011 20:29:19 -0700 (PDT)
Chris Kees cek...@gmail.com wrote:
Apologies in advance for the long post. It boils down to this: Is
there any interest from the sage community in participating in the
development of a python distribution for large-scale distributed
memory
On Tue, 26 Jul 2011 00:03:41 -0700
Robert Bradshaw rober...@math.washington.edu wrote:
On Thu, Jul 21, 2011 at 3:37 AM, Burcin Erocal bur...@erocal.org
wrote:
The main problem with subclassing Expression is that the result
returned from arithmetic is hardcoded to be an Expression again
On Mon, 25 Jul 2011 08:03:04 -0700 (PDT)
Steven Pollack stevenlawrencepoll...@gmail.com wrote:
Is the syntax for this class
t = new_exp(SR, symbolic_expression)?
So that sage: t returns symbolic_expression?
t is an instance of new_exp, which inherits from Expression. The value
of the
Hi,
On Wed, 20 Jul 2011 17:02:49 -0700 (PDT)
Steven Pollack stevenlawrencepoll...@gmail.com wrote:
I noticed that a thread was developed for this sort of thing (http://
groups.google.com/group/sage-support/browse_thread/thread/
d50dc3bc2bdbeab0/34798c0585fc034f?lnk=gstq=nicolasfwc=1#), but
On Wed, 13 Jul 2011 19:01:40 -0700 (PDT)
Steven Pollack stevenlawrencepoll...@gmail.com wrote:
I hope this code helps anyone trying to do any work in Sage with the
ultraspherical(n,a,x) function.
Note that there is an experimental patch on the issue tracker which
improves orthogonal
On Wed, 29 Jun 2011 19:54:06 -0700 (PDT)
ObsessiveMathsFreak obsessivemathsfr...@gmail.com wrote:
This is pretty infuriating.
Unfortunately we haven't worked out the interaction between maxima's
assume() function and GiNaC/Pynac's knowledge of domains yet.
sage: forget()
sage:
On Fri, 17 Jun 2011 08:10:26 -0700 (PDT)
Harald Schilly harald.schi...@gmail.com wrote:
you can also create invalid variable names, i.e. the ones starting
with a number:
sage: var('2x')
2x
sage: 2x
File ipython console,
On Tue, 7 Jun 2011 12:17:58 -0700 (PDT)
Samuel Lelievre samuel.lelie...@gmail.com wrote:
Can we not use + to add complex numbers?
sage: j = -1/2 + sqrt(3)/2*i
sage: a = -2*j*j
sage: b = -j/2
sage: print a.real(); print b.real(); print (a+b).real()
1
1/4
+ 1/4
With Sage 4.7.alpha1, I
On Wed, 11 May 2011 22:57:56 -0700 (PDT)
tvn nguyenthanh...@gmail.com wrote:
Is this a math limitation or Sage limitation ?If it's the later then
should it be worked on ?
'Sage Version 4.6.2, Release Date: 2011-02-25'
sage: var('x x2')
(x, x2)
sage: Q = PolynomialRing(QQ,[x,x2])
On Tue, 10 May 2011 06:03:14 -0700 (PDT)
Bruce brucewestb...@gmail.com wrote:
I will summarise what I have learnt from Nicolas Thiery:
If M is a monoid then the monoid algebra is constructing using
Monoid().Algebra() by, say, M.algebra(QQ).
For groups the construction GroupAlgebra is being
On Fri, 6 May 2011 15:22:25 -0700 (PDT)
tvn nguyenthanh...@gmail.com wrote:
given a list of equality expressions, is there a way to remove all the
members that can be inferred by others in the list so that the final
list contains only independent expressions and they imply all the ones
that
On Mon, 25 Apr 2011 10:11:57 -0700 (PDT)
tvn nguyenthanh...@gmail.com wrote:
just want to pump the thread up so that someone can answer
My file f1.py imports some other file f2.py which is in the same
directory, when I do sage -t f1.py I receive ImportError exception
about f2 not
On Sat, 5 Feb 2011 18:16:54 -0800 (PST)
kcrisman kcris...@gmail.com wrote:
Now browse into taylor?? source, and you see that sage call the
taylor function in maxima.
The taylor function in maxima seems very long to follow in
...maxima.../src/hayat.lisp.
More to the point, Maxima
On Mon, 31 Jan 2011 14:19:51 -0800 (PST)
Michael Beeson profbee...@gmail.com wrote:
It seems that var('z') makes sage think z is real.
simplify(real(z)) returns z and simplify(imag(z)) returns 0.
This is #6862 on trac:
http://trac.sagemath.org/sage_trac/ticket/6862
It's one of the
On Tue, 25 Jan 2011 10:29:38 -0600
Ryan Krauss ryanwkra...@gmail.com wrote:
Would it be possible to check for a user defined environment variable
(say SAGE_PYTHOPATH) and append it to PYTHONPATH in sage-env if it is
defined (I have never really bothered to learn bash programming).
The
Hi Simon,
On Mon, 25 Oct 2010 00:41:07 -0700 (PDT)
Simon King simon.k...@nuigalway.ie wrote:
@symbolic experts (Burcin et al):
Is it really necessary that x.operator() returns None and x.operands()
returns []? What about an identity operator?
The operator and operands don't have a meaning if
Hi Simon,
On Mon, 25 Oct 2010 05:09:06 -0700 (PDT)
Simon King simon.k...@uni-jena.de wrote:
I only opened one ticket, namely #10169, aiming at making
s==s.operator()(*s.operands()) work uniformely.
I don't think this makes sense for variables, numeric objects, or
constants, in other words,
Hi Simon,
On Mon, 25 Oct 2010 06:09:16 -0700 (PDT)
Simon King simon.k...@uni-jena.de wrote:
On 25 Okt., 14:39, Burcin Erocal bur...@erocal.org wrote:
If we return an identity operator for these cases, how do you plan
to test for it in your code:
Something like this:
L = x.operands
On Fri, 1 Oct 2010 06:52:11 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
Some remarks and questions...
snip
I replied to this on pynac-devel:
http://groups.google.com/group/pynac-devel/msg/f3032856d1ed6953
Cheers,
Burcin
--
To post to this group, send email to
Hi,
On Wed, 29 Sep 2010 07:00:39 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
Ok, I have finally looked at the comparison functions and exchanging :
cmpval = seq[0].coeff.compare(other.exponent);
by
cmpval = -seq[0].coeff.compare(other.exponent);
in mul::compare_pow (mul.cpp:1265)
On Wed, 29 Sep 2010 09:48:25 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
Maybe it is a good thing to keep the same order as ginac internally
and your more usual ordering for printing.
It is good to keep the ginac ordering internally. The user friendly
ordering is more expensive so
On Wed, 29 Sep 2010 12:57:54 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
On 29 sep, 20:28, Burcin Erocal bur...@erocal.org wrote:
On Wed, 29 Sep 2010 09:48:25 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
Maybe it is a good thing to keep the same order as ginac
On Fri, 24 Sep 2010 18:56:14 -0700 (PDT)
kcrisman kcris...@gmail.com wrote:
sage: a = FractionField(PolynomialRing(ZZ, 'x'))
sage: a(1/x)
weird error that seems to imply it has not coerced x to the
polynomial ring
Did I do something wrong, or is this a bug? Because of the initial
On Wed, 22 Sep 2010 18:52:32 -0700 (PDT)
lutusp lut...@gmail.com wrote:
The patch by Robert Marik attached to #9835 solves the problem you
show below.
Applied the indicated patch, same outcome:
reset()
var('g t')
x = function('x',t)
forget()
assume(g 0)
de = x - g * diff(x,t,2)
Hi Antonio,
On Wed, 22 Sep 2010 02:55:40 -0700 (PDT)
Julius juliuslul...@gmail.com wrote:
The symbolic computation section of the reference manual says:
This summation only Mathematica can perform:
symbolic_sum(1/(1+k^2), k, -oo, oo, algorithm = 'mathematica')
But to execute
Hi Jean-Pierre,
On Mon, 13 Sep 2010 04:58:00 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
I've got some other questions:
These should be on a separate thread, on sage-devel or pynac-devel.
- Sage and pynac do not realize that 2^(-b_0) and (2^b_0)^(-1) are
equal.
I guess there is
Hi Jean-Pierre,
On Thu, 9 Sep 2010 02:13:27 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
I created a Ticket on Sage's Trac:
http://trac.sagemath.org/sage_trac/ticket/9880
It could be a problem with the comparison function
expair_rest_is_less used by std::sort function like in the
Hi,
On Sun, 12 Sep 2010 09:21:12 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
Thanks for the patch, I'll have a look at the comparison functions
when I have some time, surely next week.
Where can I find the one defined by Sage ?
They are spread out through the classes in pynac.
Hi Kees,
On Fri, 10 Sep 2010 08:10:45 -0700 (PDT)
KvS keesvansch...@gmail.com wrote:
Dear all,
I'm sorry I have yet again something to bother you with. Running the
following few lines:
eq=5-e^x
print 1:,eq.substitute(x=3*x)
print 2:,eq.substitute(x=log(x))
yields the output (Sage
Hi,
Here is a short example to replicate the first error mentioned below:
b = [var('b_%s'%i) for i in range(4)]
precomp = (2^b_2 + 2)*(2^b_1 + 2^(-b_1) + 2^b_1*2^b_0 - 2^b_1*2^(-b_0)
- 2^(-b_1)*2^b_0 - 2^(-b_1)*2^(-b_0) + 2^b_0 + 2^(-b_0) - 9) + (2^b_1 +
2^(-b_1) + 2^b_1*2^b_0 - 2^b_1*2^(-b_0)
Hi Jean-Pierre,
On Wed, 1 Sep 2010 08:25:07 -0700 (PDT)
Jean-Pierre Flori jpfl...@gmail.com wrote:
I'm using Sage to do some symbolic computations.
What I am basically trying to do is to compute sums made of terms of
the form :
cst_{i_0,...,i_d)*b_0^{i_0}*...*b_d^{i_d}*2^{-b_0-...-b_d}
On Sun, 15 Aug 2010 08:37:10 -0700 (PDT)
Paul Rombouts p.a.rombo...@home.nl wrote:
Hi,
I can integrate the function exp(-x^2) to get the error function like
this:
sage: F=integral(exp(-x^2),x); F
1/2*sqrt(pi)*erf(x)
But when I try to differentiate the answer, sage does not seem to
On Mon, 12 Jul 2010 08:46:16 -0700 (PDT)
David Sanders dpsand...@gmail.com wrote:
I also note that after reading the documentation, I am still left
without an answer to my original question, which is how to do
pattern matching in Sage (or if it's even possible) for something
of the
Hi David,
On Mon, 12 Jul 2010 02:24:41 -0700 (PDT)
David Sanders dpsand...@gmail.com wrote:
On Jul 11, 8:13 pm, ma...@mendelu.cz ma...@mendelu.cz wrote:
On 11 čnc, 12:22, William Stein wst...@gmail.com wrote:
On Sat, Jul 10, 2010 at 10:04 PM, David Sanders
dpsand...@gmail.com wrote:
Hi,
On Sun, 4 Jul 2010 05:36:50 -0700 (PDT)
dirkd dirk.dancka...@gmail.com wrote:
Why is evaluating this expression problematical?
y1(x)=x^2;y2(x)=5-x;
a0=1;an=3;Delta=(an-a0)/n;p(k)=a0+(k-1/2)*Delta;
I(n)=sum(abs(y2(p(k))-y1(p(k)))*Delta,k,1,n);
N(I(10))
SAGE respons:
snip
File
On Thu, 1 Jul 2010 13:40:03 -0700 (PDT)
jeral jeral2...@gmail.com wrote:
Hi, All.
Is there any way in sage to match not only given expression against
pattern, but equivalent expressions too?
Say, i want to match expression with pattern pat = c*x^p*y^q*z^r,
(2*x^2*y^3*z^4).match(pat)
On Thu, 1 Jul 2010 13:32:47 -0700
William Stein wst...@gmail.com wrote:
On Thu, Jul 1, 2010 at 12:26 PM, Dieter dieter.fishb...@gmail.com
wrote:
It looks like I have Ubuntu v. 8.04.4 LTS.
Is there a binary version available that would be compatible?
No.
Unfortunatley, I am using a
Hi,
On Sat, 29 May 2010 08:39:17 -0700 (PDT)
isurug isurugod...@gmail.com wrote:
I was wondering if there is any support in sagemath to define new
variables that are derivatives or integrals of existing variables. for
instance, suppose that i define a variable called theta , is it now
Hi Mike,
On May 20, 10:59 am, Mike Witt wrote:
Is there any way to make the square root of -1 display lower case
i rather than I (at least for latex output)?
Not in a user friendly way. The complex I is just a number field
element and number fields don't support latex output with different
Hi Alasdair,
On Thu, 20 May 2010 18:56:59 -0700 (PDT)
Alasdair amc...@gmail.com wrote:
sage: diff(gamma(x))
gamma(x)*psi(x)
sage: psi(1)
NameError: name 'psi' is not defined
Now is that cheeky or what - Sage giving an answer with a function
which is not defined!
This was fixed a
On Mon, 3 May 2010 10:18:42 -0400
David Joyner wdjoy...@gmail.com wrote:
I think Sage calls Maxima and Maxima is getting i (your variable)
and I (sqrt(-1)) mixed up. I guess this is a bug, but it might be
known already.
It's reported here:
http://trac.sagemath.org/sage_trac/ticket/6882
I'm
Hi,
On Mon, 03 May 2010 06:55:25 -0500
Jason Grout jason-s...@creativetrax.com wrote:
On 05/03/2010 06:45 AM, Simon King wrote:
Hi Maite,
On May 3, 11:15 am, Maite Aranesmaite.al...@gmail.com wrote:
Does sage use symbolic calculus if it has to compare two symbolic
expressions inside
On Fri, 23 Apr 2010 07:02:23 -0700 (PDT)
Nils Bruin nbr...@sfu.ca wrote:
On Apr 22, 11:21 am, Jason Grout jason-s...@creativetrax.com wrote:
On 04/22/2010 12:33 PM, eric948470 wrote:
If I declare some variables, and after completing the calculation
I don't want them to be variables
On Fri, 9 Apr 2010 22:51:30 -0700 (PDT)
Alec Mihailovs alec.mihail...@gmail.com wrote:
On Apr 10, 1:32 am, Adam Getchell adam.getch...@gmail.com wrote:
Hi all,
I realize this maybe a bit of an insane question, but I'm looking
for a way to use ecl within sage besides:
./sage -ecl
Hi Alex,
On Wed, 7 Apr 2010 16:56:01 -0700 (PDT)
Alex Raichev tortoise.s...@gmail.com wrote:
What the?
--
| Sage Version 4.3.5, Release Date: 2010-03-28 |
| Type notebook() for the GUI, and license()
Hi again Alex,
Many thanks for the report.
On Wed, 7 Apr 2010 16:05:09 -0700 (PDT)
Alex Raichev tortoise.s...@gmail.com wrote:
Hi all:
I ran into an error trying to evaluate the exponential function at an
algebraic number. Looks like there's a bug in substituting algebraic
numbers for
On Mon, 5 Apr 2010 00:39:02 -0700 (PDT)
Kwankyu ekwan...@gmail.com wrote:
sage: f=sqrt(pi)^-1*exp(-x^2/2); f
e^(-1/2*x^2)/sqrt(pi)
sage: g=integral(f,(x,0,2)); g
1/2*sqrt(2)*erf(sqrt(2))
sage: n(g)
Traceback (most recent call last):
...
TypeError: cannot evaluate symbolic expression
On Tue, 23 Mar 2010 05:07:05 -0700 (PDT)
tk tobi...@web.de wrote:
I tried to do some calculations and used a self-defined function.
After that, I wanted to change it to another function like sin or
just
a constant.
I am using the binary version on Ubuntu Karmic.
What I got was the
On Fri, 12 Mar 2010 15:23:43 +0100
Paul Zimmermann paul.zimmerm...@loria.fr wrote:
is there a way in Sage to convert expressions involving trigonometric
or hyperbolic functions to exponentials, like the convert/exp
function of Maple?
convert(sinh(log(t)),exp);
On Wed, 10 Mar 2010 12:35:28 -0800 (PST)
Harald Schilly harald.schi...@gmail.com wrote:
On Mar 10, 9:27 pm, Gustav Delius gustav.del...@gmail.com wrote:
There is a surprising typesetting bug ...
http://trac.sagemath.org/sage_trac/ticket/8491
Indeed this is very embarrassing. I can't
Hi Panos,
On Sun, 7 Mar 2010 07:19:44 -0800 (PST)
panos p.tsakn...@gmail.com wrote:
I tried the following code on a 64bit Linux machine running Sage
4.3.3:
--
| Sage Version 4.3.3, Release Date: 2010-02-21
Hi Robert,
On Sun, 28 Feb 2010 07:49:34 -0800 (PST)
ma...@mendelu.cz ma...@mendelu.cz wrote:
Can you give us (very briefly) few pointers where to start to learn
pynac.
Here's a first attempt:
http://wiki.sagemath.org/symbolics/pynac_start
Feel free to edit the page as you see fit and ask
Hi Robert,
On Fri, 26 Feb 2010 17:14:22 -0800 (PST)
ma...@mendelu.cz ma...@mendelu.cz wrote:
Holding symbolic expressions has been requested several times here.
For example [1]-][4]. Is there something new in this topic? Now or in
near future?
Here is another related post:
Community Member
States (except Austria) and Associated States. A link to the
application form is also available at the above website.
Sincerely Yours,
The organizing committee Burcin Erocal, Ralf Hemmecke and Temur Kutsia
--
To post to this group, send email to sage-support@googlegroups.com
On Fri, 19 Feb 2010 05:51:46 -0800
William Stein wst...@gmail.com wrote:
I am sending this to sage-support
On Thursday, February 18, 2010, Joerg Arndt ar...@jjj.de wrote:
The following doesn't finish in reasonable time:
var('E1, E2, E4, E5, E10, E20');
Hi Jeff,
On Sun, 21 Feb 2010 13:28:09 -0800 (PST)
Jeff Stroomer jstroom...@hotmail.com wrote:
Sage Folks,
I am working on a problem that requires me to generate a large matrix
over QQ, and then calculate the row-echelon form. I think there's a
good chance I can speed up the calculations
Hi Eliot,
On Thu, 18 Feb 2010 04:02:16 -0800 (PST)
eliot brenner eliotpbren...@gmail.com wrote:
Thanks!
In the meantime, any suggestions for a work-around (besides write the
entire program in PARI or C)?
You can just use mpmath to compute besselk. The ticket Dan mentioned
(#3426) has these
Hi Robert,
On Tue, 16 Feb 2010 06:19:41 -0800 (PST)
ma...@mendelu.cz ma...@mendelu.cz wrote:
Dear sage-support
the following plot works
x,y=var('x,y')
contour_plot(sqrt(1-(x^2+y)^2),(x,-2,2),(y,-2,0), fill=False,
labels=True)
but the following not:
x,y=var('x,y')
On Sun, 14 Feb 2010 14:07:47 +1100
Alex Ghitza aghi...@gmail.com wrote:
On Sat, 13 Feb 2010 16:27:22 -0800 (PST), Tom Roche
tlro...@gmail.com wrote:
summary: I installed ubuntu package=sagemath (and dependencies)
using aptitude on 2 previously-sage-clean ubuntu karmic boxes. Sage
appeared
Hi Stefan,
On Mon, 25 Jan 2010 06:49:55 -0800 (PST)
Ichnich warm...@web.de wrote:
there seems to be a bug in substitute:
var('k1 k2 k3')
f = (k1+k2)^2
f.substitute(k1+k2==k3)
gives k3^2 as expected.
var('k1 k2 k3')
f = (k1+k2)*2
f.substitute(k1+k2==k3)
gives 2*k1 + 2*k2. The
On Sun, 17 Jan 2010 11:52:30 +0100
Rafael Fourquet rafael.fourq...@gmail.com wrote:
I find the following counter-intuitive:
sage: i^2
-1
sage: a = (1-i) * x ; a
-(I + 1)*x
sage: a.coeff(x,1)
-I + 1
Is this a bug?
It made me make an error in the subject of an exam I wrote.
This is
Hi Jason,
On Sat, 02 Jan 2010 15:14:15 -0700
Jason Grout jason-s...@creativetrax.com wrote:
Here is the problem, narrowed down a bit:
sage: log(SR(float(-7.0)))
Traceback (most recent call last):
...
ValueError: math domain error
sage: log(float(-7.0))
1.94591014906 + 3.14159265359*I
Hi,
On Thu, 31 Dec 2009 08:37:55 -0800 (PST)
VictorMiller victorsmil...@gmail.com wrote:
Is there any easy way of building up what I'd call a ring of
exponentials (maybe there's a better word)? For example I'd like to
work in the ring QQ[[2^j for j in Integers()]]: the ring with
On Sat, 5 Dec 2009 03:32:04 -0500
William Stein wst...@gmail.com wrote:
On Fri, Dec 4, 2009 at 9:22 PM, taco jcho...@gmail.com wrote:
Sooo I am currently working on trying to simplify the resulting
expressions in sage to shrink them down to a smaller size. Here is
the problem: I
Hi,
On Sun, 29 Nov 2009 17:06:36 -0800 (PST)
rych rych...@gmail.com wrote:
var('y', domain='real')
assume(y, 'real')
abs(exp(y*I)).simplify()
1
abs(exp(1.1*y*I)).simplify()
e^(1.1*I*y)
The last result is incorrect. It seems simplify() doesn't like
floating point?
Thank you
Hi Roland,
On Sun, 29 Nov 2009 11:46:00 -0800 (PST)
Rolandb rola...@planet.nl wrote:
Unhandled SIGSEGV: A segmentation fault occured in SAGE.
This probably occured because a *compiled* component
of SAGE has a bug in it (typically
Hi Alex,
On Sun, 22 Nov 2009 18:30:35 -0800 (PST)
Alex Raichev tortoise.s...@gmail.com wrote:
Sweet, Burcin. I'll check out your patch. Can you increase the
derivative orders to 20 something?
Sorry, I won't have more time to play with this in the next two weeks.
If you still run into
Hi,
On Sat, 21 Nov 2009 14:02:16 +0100
Burcin Erocal bur...@erocal.org wrote:
I can't believe I'm looking at these hashes for the third time. I
finally took some time to think about this, and found an (almost)
perfect hash function to replace my previous braindead implementation.
I hope we
Hi Alex,
On Fri, 20 Nov 2009 11:51:57 -0800 (PST)
Alex Raichev tortoise.s...@gmail.com wrote:
Thanks, William. I'll check that out.
Also, for those interested in the bug i reported, i'd like to rephrase
the description of my situation, because i stated it a little
confusingly above. Take
Hi Robert,
On Wed, 11 Nov 2009 02:45:11 -0800 (PST)
ma...@mendelu.cz ma...@mendelu.cz wrote:
So my question for developers and experienced users os Sage is: Is
there a function which converts input like f = 0.25 / (log(5.74 /
Re^0.9, 10))^2 / 4 into 0.331368631905/log(5.74/Re^0.9)^2 in a
Hi,
On Tue, 3 Nov 2009 12:42:47 -0800 (PST)
cchristy...@gmail.com 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 :
On Wed, 4 Nov 2009 03:30:24 -0800 (PST)
cchristy...@gmail.com cchristy...@gmail.com wrote:
snip
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
Hi,
On Sun, 25 Oct 2009 19:44:21 -0700 (PDT)
John H Palmieri jhpalmier...@gmail.com wrote:
On Oct 25, 7:37 pm, Marshall Hampton hampto...@gmail.com wrote:
Latex doesn't actually support \sech, so this can't really be
considered an error on Sage's part.
Note that
sage:
On Thu, 22 Oct 2009 15:16:32 -0700 (PDT)
Mikie thephantom6...@hotmail.com wrote:
I want to take the expression sqrt(16) from a function parameter and
return the sqrt(16) not 4. Is this possible?
Not right now, sorry.
I have an idea how to hold symbolic expressions so they are not
evaluated
Hi Stefan,
On Wed, 21 Oct 2009 19:49:58 -0700 (PDT)
Ichnich warm...@web.de wrote:
Hi,
something does not work anymore in my notebook (with version 4.1.2
ubuntu 64bit):
var('a,b,c,I')
model(I)=a*I+b
model_exp = exp(I)**a*(b)
sol1_l={b: 5.0, a: 1.1}
On Wed, 7 Oct 2009 13:20:30 -0700 (PDT)
ma...@mendelu.cz ma...@mendelu.cz wrote:
BTW: When looked at this problem, the notation D[0](alpha)(r)^2 seems
to be unusual to me.
Is it possible to fix sage so that it prints derivatives of functions
in one variable
as usual: alpha'(r) ?
There is
Hi Georg,
On Wed, 30 Sep 2009 11:07:11 -0700 (PDT)
ggrafendorfer georg.grafendor...@gmail.com wrote:
I would like to import my own library (which for example resides in ~/
mytools/) to the sage-python (respectively sage) environment.
Normally (for system python) one adds '~/mytools' to the
On Tue, 22 Sep 2009 18:47:50 -0700 (PDT)
The_Fool masterfu...@gmail.com wrote:
I managed to create the symbolic polygamma function as psi(order,x).
Psi is limited in what it can do, though. I can get it to grab
special values from Maxima's or GiNaC's table, but I still cannot get
it to
Hi Francois,
On Mon, 21 Sep 2009 21:22:39 +0200
Francois Maltey fmal...@nerim.fr wrote:
snip
Concretely
??? I'll don't see how to operate over exp(2x) = exp(x)^2.
??? Is there a hold (or freeze) function in sage which remains
exp(a)^2. Also look at integrate (exp(2*x)/(exp(3*x)+1), x). The
On Mon, 21 Sep 2009 22:29:33 -0700 (PDT)
The_Fool masterfu...@gmail.com wrote:
snip info on how sage -br renders a binary install useless
Typing %upgrade tells me to delete a hidden file and retry the
command. Sage still doesn't work after I do. The same situation
occurred after I
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