Hello,
In order to figure things out, I think we need to know a bit more
about your install. How did you install Sage? Did you use one of the
binaries or did you build from source? What processor is your
computer running?
--Mike
On Mon, Jul 7, 2008 at 3:59 PM, Alejandro Jakubi
[EMAIL
Hi Phil,
I don't think there is an official way to get at the terms, but here
is something that works:
sage: var('x,y')
(x, y)
sage: t = x^2 + y^2
sage: type(t)
class 'sage.calculus.calculus.SymbolicArithmetic'
sage: t._operator
built-in function add
sage: t._operands
[x^2, y^2]
sage:
Hello,
In Python you can use *args and **kwds in the function definition to
match optional arguments and keyword arguments; args will be a tuple
of the arguments and kwds will be a dictionary for the keyword
arguments. For example, look at the behavior of the following
function:
sage: def
Hello,
Sorry I didn't get in on this sooner -- I've been really busy with
things this past week. Anwyays, CombinatorialAlgebra is getting a bit
of an update, and the changes are on the sage-combinat patch
repository. You can see a working group ring here:
Mike's solution is ok for the precision but doesn't work for our
little example log(2+a-2), because it still says - infty and in my
application it doesn't fit either.
Doing log(2+a-2) instead of log(2-a-2) should work assuming that you
have enough precision to avoid the cancellation problem
Hello,
while working a little with sage I encountered some problems sage has
concerning numerical precision at very small numbers.
I hope I can make my point with a little example.
sage: a=1e-175
sage: log(a)
-402.952391273958
There are a few issues at hand here. First, you have to be
Hello,
This is definitely not a problem with coercion -- it's a problem with
the iterator for G. For example. try this:
sage: z = iter(G)
sage: z
iterator object at 0x3c737d0
sage: z.next()
[0 1]
[1 0]
sage: z.next()
[0 1]
[1 1]
It takes quite a bit of time to do each .next() which makes me
Hi Andrew,
You can do this by saving the plots to an object and then adding them together.
sage: t = var('t')
sage: p1 = parametric_plot( (s), sin(2*t)), 0, 2*pi, rgbcolor=hue(0.6) )
sage: p2 = parametric_plot( (cos(t), cos(3*t)), 0, 2*pi, rgbcolor=hue(0.3) )
sage: (p1+p2).show()
One can do
This issue came up before and is being tracked here:
http://trac.sagemath.org/sage_trac/ticket/2827
--Mike
On Mon, May 26, 2008 at 4:09 PM, Greg Landweber
[EMAIL PROTECTED] wrote:
Hello,
I just noticed that as of Sage 3.0.1, the notebook has default
secure=False. While that is all well and
On Thu, May 22, 2008 at 12:45 AM, roleic [EMAIL PROTECTED] wrote:
I can do html(latex(sage-output))
What is the best way to import it into MSWord?
I don't have Word, but maybe this might be useful: http://www.chikrii.com/ .
There is no way to get latex for the input since it only makes sense
Maybe this? http://ooolatex.sourceforge.net/
--Mike
On Thu, May 22, 2008 at 2:04 AM, roleic [EMAIL PROTECTED] wrote:
On May 22, 9:56 am, Mike Hansen [EMAIL PROTECTED] wrote:
On Thu, May 22, 2008 at 12:45 AM, roleic [EMAIL PROTECTED] wrote:
I can do html(latex(sage-output))
What
With html(latex(sage-output) we get html code, right? And MSWord is
among other things also a html-editor capable of reading and writing
html. So if I could save the sage html code somehow then I could try
whether MSWord can read and display it...
Now I just tested that and of course... it
I think you might have an easier time getting Pythonika (
http://dkbza.org/pythonika.html ) to do what you want.
--Mike
On Tue, May 6, 2008 at 11:41 PM, Amir [EMAIL PROTECTED] wrote:
Can I start a Sage session from C? I would need to pass commands, set
and get variables, and cleanly
Hi,
Do you know a good example of an javascript text editor that does
this? If you could search around, that would be most helpful. The
biggest concern is probably the impact on performance; it's the same
issue with things like syntax highlighting.
--Mike
On Tue, Apr 22, 2008 at 1:21 AM,
On Mon, Apr 7, 2008 at 6:25 AM, Ondrej Certik [EMAIL PROTECTED] wrote:
Yes, I did. This is the code developed by people at Simula. It works
nice, but it's quite difficult to install. I generally prefer smaller
tools, if I can get the job done.
Ondrej
Other than size and build issues,
Hi,
The issue is that .roots() now returns tuples with the root and its
multiplicity. You can see this if you look at v. You need to select
the 0th entry of the tuple to raise to a power.
sage: RDF = RealDoubleField()
sage: R.y = PolynomialRing(RDF)
sage: # Let y be x^(1/9).
sage: f = y +
Hi Becky,
Did you have a particular group in mind?
--Mike
On Mon, Apr 7, 2008 at 3:19 PM, Becky [EMAIL PROTECTED] wrote:
Is there a command for SAGE to write an element of a group in terms of
the group's generators?
-Becky
--~--~-~--~~~---~--~~
To
Hi James,
Hello,
On Sun, Apr 6, 2008 at 1:33 PM, James Hart [EMAIL PROTECTED] wrote:
How should I be formatting this tuple if I want it to plot each graph
in a different color but in the same plot graph?
It works when it's all the same color i.e.
The idiom that Sage uses is to construct
Hi Erick,
How do you calculate the delta invariant? (This is not my area of
math.) How large of m and n do you want to work with? For example,
here is some Sage code to generate all the integer partitions of 40:
sage: time l = Partitions(40).list()
CPU times: user 0.50 s, sys: 0.03 s, total:
the partitions and do it all by
hand, but that's an awful pain.
~Erick
On Apr 3, 5:51 pm, Mike Hansen [EMAIL PROTECTED] wrote:
Hi Erick,
How do you calculate the delta invariant? (This is not my area of
math.) How large of m and n do you want to work with? For example,
here
Hello,
sage: r = matrix(SR, 4, 4, [[21,17,6,8], [-5,-1,-6,-3], [4,4,16,2],
[2,3,-4,-1]])
sage: r.exp()
.
This is happening since Maxima is failing to do the computation for
reasons that I don't know. I suppose it wouldn't be too difficult to
write our own matrix exponentiation.
Hi Georg,
There is currently support for taking the matrix exponential of a
symbolic matrix already in Sage since it is using Maxima in the
background. I suppose that this should be extended to other types of
matrices.
sage: matrix(SR, 3, 3, [[21,17,6],[-5,-1,-6],[4,4,16]]).exp()
[ (13*e^16
Hello,
What version of Sage are you using? I tried this on my local machine
and can't duplicate the error that you're getting.
--Mike
On Sun, Mar 30, 2008 at 12:44 PM, bourba [EMAIL PROTECTED] wrote:
Hello.
I would like to access external C code so I have
exactly followed the example
AFAIK, you can't use LaTeX packages with jsmath. It just implements
the standard mathmode.
--Mike
On Sat, Mar 29, 2008 at 1:18 PM, Jason Grout
[EMAIL PROTECTED] wrote:
gerhard wrote:
closely related question:
I wanted to use easymat for a matrix display. jsmath seems to support
it.
Hello,
1. The solve wrapper of maxima does some nice stuff symbolically, but
of course it can't handle everything, like
sage: solve(x^5-x-12,x)
[0 == x^5 - x - 12]
which makes sense! But I poked around a little for a numerical
approximation of solutions command and didn't find
I don't know of any way to do it using solve(). What you're really
wanting to do is use the Chinese Remainder Theorem. After removing
redundant equations, you can do the following:
sage: a = [2,3,4]
sage: b = [3,4,5]
sage: CRT_list(a,b)
59
sage: lcm(b)
60
That being said, I think the behavior
Hi Neal,
When you start up the notebook on the Mac, pass the option
server='192.168.1.103' and then you should able to access it on you
Windows box by going to https://192.168.1.103:8000 . Let me know if
that works.
--Mike
On Wed, Mar 5, 2008 at 8:06 AM, Neal [EMAIL PROTECTED] wrote:
I
Maybe I'm missing something, but what is your question?
--Mike
On Tue, Mar 4, 2008 at 12:00 PM, dean moore [EMAIL PROTECTED] wrote:
Playing with splines for other reasons, I found what I beat down to the
following snippet (see attached)
v = [] # Will hold points
Hi Jimmy,
It looks like you downloaded the 10.5 (Leopard) binary when you are
running OS X 10.4 (Tiger). If this is the case, then you should try
downloading the binary for 10.4.
--Mike
On Feb 6, 2008 5:09 PM, Jimmy Crockett [EMAIL PROTECTED] wrote:
I downloaded Sage and followed steps in
Hello,
Here is an example of the underlying problem
sage: a = -x/(2*x-4)
sage: e = lambda e: taylor(e,x,3,4)
sage: e(a)
-3/2 + x - 3 - (x - 3)^2 + (x - 3)^3 - (x - 3)^4
sage: type(_)
class 'sage.calculus.calculus.SymbolicArithmetic'
sage: b = e(a)._maxima_(); b
x-(x-3)^4+(x-3)^3-(x-3)^2-9/2
To easily see the coefficients of each
term in the taylor polynomial?
Yes, that would be the reason why in this case.
--Mike
--~--~-~--~~~---~--~~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
It is due to the fact that ^ has a higher precedence than - in Python.
n(-1^(1/3)) is the same as n((-1^(1/3))).
--Mike
On Jan 23, 2008 5:04 PM, Ted Kosan [EMAIL PROTECTED] wrote:
Does anyone have any thoughts on why the following 2 code samples give
different results?:
#SAGE Version 2.10,
Hello,
I happen to have lots of space on an ISP site which I administer.
Is it possible to unarchive the sage package in the public_html folder
and start sage with a .php script to host educational notebooks?
If you have shell acess on your ISP's machine than it's probably possible.
On Jan 18, 2008 12:24 PM, Georg Grafendorfer
[EMAIL PROTECTED] wrote:
OK, thanks, so sage-python just refers to the sage-version of python
instead of the systems own python version and nothing else !?
Correct.
--Mike
--~--~-~--~~~---~--~~
To post to this
Hi Kiran,
Adding good Lie algebra support to Sage has been something on my list
for awhile. I just made it out here to Berkeley and am going to be
here all semester for the program at MSRI. I was that you were
registered for the workshop next week. What time do you get in? We
can discuss
Hello,
Sympy provides it's own matrices. As mentioned before, there needs to
be more work done with sympy in Sage so that what you tried does work.
In the meantime, look at the following example:
sage: import sympy
sage: x = sympy.Symbol('x')
sage: m = sympy.Matrix([[1,x],[x,1]])
sage: m
1 x
Hello,
The reason why the symbolic stuff in Sage is slow is that it uses a
psuedo-tty interface to talk to Maxima. There is a lot of overhead
with this due to waiting, synchronization, parsing the string output,
etc. One way to get the symbolic stuff to be faster is to make using
Sympy since
I had made this a ticket a few days ago:
http://sagetrac.org/sage_trac/ticket/1587
--Mike
On 12/26/07, William Stein [EMAIL PROTECTED] wrote:
On Dec 26, 2007 7:35 PM, Marshall Hampton [EMAIL PROTECTED] wrote:
At least in the United States, and I assume some other places as well,
Hello Bill,
sage: E = EllipticCurve('5077a'); E
Elliptic Curve defined by y^2 + y = x^3 - 7*x + 6 over Rational Field
sage: E?
Type: EllipticCurve_rational_field
Base Class: class
'sage.schemes.elliptic_curves.ell_rational_field.EllipticCurve_rational_field'
String Form:
One more question not related to this topic. I already use maxima
some by itself. I use a package called wxmaxima or something like
that, and it formats the output in a pretty way. Will sage do that?
I see in the reference manual that I can tell it to give me output in
latex, but it
Hello,
The actual issue was that I forgot to covert symmetrica's LONGINT type
( 22 ) over to the correct Sage type. I hadn't actually tested it
with calculations that got up to numbers that big. I made a ticket
for this and posted a patch: http://sagetrac.org/sage_trac/ticket/1445
It will be
9, 11:34 pm, Mike Hansen [EMAIL PROTECTED] wrote:
Hello,
The actual issue was that I forgot to covert symmetrica's LONGINT type
( 22 ) over to the correct Sage type. I hadn't actually tested it
with calculations that got up to numbers that big. I made a ticket
for this and posted
http://www.sagemath.org:9002/sage_trac/ticket/1235 should be faster.
--Mike
On Dec 8, 2007 12:50 PM, Ted Kosan [EMAIL PROTECTED] wrote:
William wrote:
As a start I've implemented find_root (and some minizing and
maximizing functions)
and posted a patch here:
Is there some easy way I could have figured out that m would respond
to the message `apply_map'?
(Or whatever messages are called in the post-Smalltalk era.)
In Python, they're known as methods and they come associated with an
object based on its type. To get a list of all the methods that m
Hello,
1) Taylor series of a rational function.
This works:
sage: cos(x).taylor(x,0,2)
This doesn't:
sage: x/(1+x).taylor(x,0,2)
This is very confusing:
sage: var('x')
sage: x/(1+x).taylor(x,0,2)
This is due to the fact that '.' binds tighter than '/'. For example,
sage:
Hello,
In Maple one typically write f:=x-x if one means a function instead
of an expression. Doing something similar in SAGE makes a *lot* of
sense, so I don't object inherently to the lambda notation, although
the default Python syntax (lambda) is not intuitive to an ordinary
math student.
Hello,
I've posted a patch for # -- http://sagetrac.org/sage_trac/ticket/
--Mike
On Nov 26, 2007 3:34 PM, Ted Kosan [EMAIL PROTECTED] wrote:
William wrote:
I think one student working for two weeks could greatly enhance solve,
but making it:
(1) try the maxima solve, and
This is ticket #987 which was fixed in 2.8.9.
--Mike
On Nov 20, 2007 5:37 AM, David Joyner [EMAIL PROTECTED] wrote:
On Nov 20, 2007 8:12 AM, [EMAIL PROTECTED]
[EMAIL PROTECTED] wrote:
As far as i know, length of curve, defined as
f(x)
from a to b (a = x = b) is
L = integral from a
Hmm... I just tested it on a newer version, and I get the incorrect
answer. I'll look into it more.
--Mike
On Nov 20, 2007 7:03 PM, Mike Hansen [EMAIL PROTECTED] wrote:
This is ticket #987 which was fixed in 2.8.9.
--Mike
On Nov 20, 2007 5:37 AM, David Joyner [EMAIL PROTECTED] wrote
Hello Lou,
All of Sage's Python stuff exists independently of the system-wide
Python and shouldn't have any effect on it. In particular, if the
$SAGE_ROOT directory is something like /Applications/sage, then Sage's
Python will live under /Applications/sage/local.
--Mike
Both work correctly for me with sage -singular in 2.8.10.
--Mike
On 11/1/07, Martin Albrecht [EMAIL PROTECTED] wrote:
On Thursday 01 November 2007, Ursula Whitcher wrote:
(I tried to post about my problem once before, so my apologies if this
comes through twice.)
I'm receiving a
Hello,
My new(er) Permutations combinatorial class should handle things correctly.
sage: MS = MatrixSpace(QQ, 2, 2)
sage: A = MS([1,2,3,4])
sage: Permutations(A.rows()).list()
[[(1, 2), (3, 4)], [(3, 4), (1, 2)]]
sage: MS = MatrixSpace(GF(2),2,2)
sage: A = MS([1,2,3,4])
sage:
I don't think that anything is really going wrong. There is overhead
when talking to Maxima through the pexpect interface. You should post
the code you are running to see if it can be optimized (with respect
to the maxima interface).
--Mike
If you get that error message, you can use assume to make it so that
Maxima does not ask the question:
sage: assume(x^2-x+1 0)
sage: integrate(x/(1+x^3),x,1,infinity)
(6*log(2) - sqrt(3)*pi)/18 + pi/(2*sqrt(3))
--Mike
On 10/25/07, kcrisman [EMAIL PROTECTED] wrote:
SAGE (via Maxima) can
Hello Rishi,
You can use the 'save' command as illustrated below.
sage: a = matrix(2, [1,2,3,-5/2])
sage: save(a, '/home/mike/a.sobj')
sage: b = load('/home/mike/a.sobj')
sage: b
[ 12]
[ 3 -5/2]
Note that the server need to have to have permission to write the file
to the
://sage.scipy.org/sage/
-~--~~~~--~~--~--~---
# HG changeset patch
# User Mike Hansen [EMAIL PROTECTED]
# Date 1193248166 18000
# Node ID ff6836693992d0cdf8513083904cccafb5b9bfa5
# Parent 384cf32899ac4ad7e086bbc3ca53c577d68bd3f1
Fixed #982
diff -r 384cf32899ac -r
**
File integer.pyx, line 1624:
sage: (10).divide_knowing_divisible_by(26) # close
Expected:
3846
Got:
2312678544
Hello,
Are you running a 64-bit machine?
I looked at the code, and the problem seems to come from the fact that
it is doing a naive check on the type of the numpy array; it is
currently assuming that your float32 array is a float64 array which is
why you are getting the strange results you are.
from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://sage.math.washington.edu/sage/ and http://sage.scipy.org/sage/
-~--~~~~--~~--~--~---
# HG changeset patch
# User Mike
Hello,
The issue is that you are passing in x^2 as a function. Since x is
defined by default to be a symbolic expression, then x^2 is also a
symbolic expression. Furthermore, when you apply it to a value, you
also get a symbolic expression. See this:
sage: g = x^2
sage: type(g)
class
Hello Simon,
You can import the SAGE functionality you need in your module by just
importing the appropriate sage modules into your .pyx file. For
example, if you want to use the binomial function, just add
from sage.rings.arith import binomial
to the top of your .pyx file.
--Mike
On
Hello,
I posted patches to fix this on http://sagetrac.org/sage_trac/ticket/587
. They should be in sage-2.8.3.3 which was released today. sage -
upgrade should do the trick.
--Mike
On Sep 4, 12:17 pm, mabshoff [EMAIL PROTECTED]
dortmund.de wrote:
On Sep 4, 5:10 pm, Markus Fraczek [EMAIL
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