Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 1438 by flor...@mickler.org: bug in intersection: segment -
segment
http://code.google.com/p/sympy/issues/detail?id=1438
entity1 = Segment(Point(-10,10),Point(10,10))
entity2 = Segment(Point(-5,-5),Point(-5,5))
print
Comment #2 on issue 1390 by werner.ho: setup.py --record: manpage of
isympy.1 is not listed correctly
http://code.google.com/p/sympy/issues/detail?id=1390
I'm sorry. The error is not inside sympy. It's a rpm packaging error.
Explanation:
The rpm build script of openSUSE compresses all man
Comment #1 on issue 1438 by flor...@mickler.org: bug in intersection:
segment - segment
http://code.google.com/p/sympy/issues/detail?id=1438
attaching now test for vertical segment, which fails with current
implementation and
a patch which solves the containment tests for vertical lines a
Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 1439 by smichr: polynomial solution missing real roots
http://code.google.com/p/sympy/issues/detail?id=1439
The equation -1936 - 5056*x - 7592*x**2 + 2704*x**3 - 49*x**4 has two real
roots at about 3.6 and 52 but only
Status: New
Owner: asmeurer
Labels: Type-Defect Priority-Medium Integration
New issue 1441 by asmeurer: integrate takes forever
http://code.google.com/p/sympy/issues/detail?id=1441
I ran the below for several hours, and when after that it had still not
returned anything, I gave up. It
should
Updates:
Labels: Integration
Comment #4 on issue 1127 by asmeurer:
integrate(2*a/2*a)**2+x**2))**(3/2)),x) gives traceback
http://code.google.com/p/sympy/issues/detail?id=1127
I have found another integral that does this:
integrate(-(1 + (-x + x**2)**(1/2))/(-x + (1 + (-x +
Status: Accepted
Owner:
Labels: Type-Defect Priority-Medium NeedsReview Milestone-Release0.6.5
New issue 1442 by ondrej.certik: mathml patches
http://code.google.com/p/sympy/issues/detail?id=1442
http://groups.google.com/group/sympy-patches/browse_thread/thread/af189fc4af1e9748
--
You
Updates:
Status: Invalid
Comment #3 on issue 1390 by ondrej.certik: setup.py --record: manpage of
isympy.1 is not listed correctly
http://code.google.com/p/sympy/issues/detail?id=1390
Ok, excellent. If you find more bugs, just report them as well, until we
figure out
whose bug it is
Updates:
Labels: NeedsReview Milestone-Release0.6.5
Comment #2 on issue 1438 by ondrej.certik: bug in intersection: segment -
segment
http://code.google.com/p/sympy/issues/detail?id=1438
(No comment was entered for this change.)
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You received this message because you are listed in
asmeurer wrote:
I see that the gods do not want me to get this in. Apparently the
files did not make it to the last message. I am just going to do what
I know works: below is the text copied and pasted from the 4 patches.
If it is easier, you can still pull from my github repo with the
What are you using for an email program?
My email program is not the problem. I use Apple Mail, but those send
just fine. The problem was in sending patches through git using the
send-email command. The files were corrupted because they were in
the wrong character encoding. For
The second patch is +1 and I think I reviewed the first patch already
and I had some comments to it.
Ondrej
On Fri, May 22, 2009 at 11:42 AM, Luke hazelnu...@gmail.com wrote:
Issue 626 is fixed by these two patches. Also, solve can now Symbol,
Function, and Derivative types.
I implemented
It fails the following tests:
$ bin/test sympy/utilities/
= test process starts ==
executable: /usr/bin/python (2.6.2-final-0)
sympy/utilities/tests/test_code_quality.py[2] F. [FAIL]
Let's wait for Fabian's review.
http://code.google.com/p/sympy/issues/detail?id=1442
Thanks for the patches!
Ondrej
On Mon, May 25, 2009 at 4:37 PM, Fabian Pedregosa fab...@fseoane.net wrote:
Thanks for the patches, thanks for making the appropriate changes. I am
quite busy right now with
Ok. Fabian discovered though that the patch makes some other (untested
yet) things fail. So we need to fix it the right way --- Fabian, are
you still working on that?
Ondrej
On Sun, May 24, 2009 at 2:01 PM, Luke hazelnu...@gmail.com wrote:
I put it in there, but commented out, so that it
The patch looks good, it's in. Thanks!
On Mon, May 25, 2009 at 4:44 PM, Luke hazelnu...@gmail.com wrote:
Attached is the patch that Fixes issue 626 and allows for solve() to
handle Function and Derivative instances, implements tests for both
cases, and has extensive commenting.
All tests
Hi Aaron -- I wanted to push this in, but git is telling me:
$ git am
~/Desktop/0001-Fixed-shebang-lines-in-test-scripts-to-usr-bin-env\(3\).patch
Patch does not have a valid e-mail address.
I am too busy now to figure out what went wrong. I don't see why the
email address should be wrong it
On Tue, May 26, 2009 at 10:08 AM, Aaron S. Meurer asmeu...@gmail.com wrote:
What are you using for an email program?
My email program is not the problem. I use Apple Mail, but those send
just fine. The problem was in sending patches through git using the
send-email command. The files were
OK. Those were actually on my github account in the odes branch. It
is possible to pull the commits from the hashes, no? I provided them
in the main thread.
Did you think the logcombine function was ok?
Aaron Meurer
On May 26, 2009, at 11:02 PM, Ondrej Certik wrote:
On Tue, May 26,
Thanks.
On May 25, 9:02 pm, Aaron S. Meurer asmeu...@gmail.com wrote:
You need to use the exclude option I was telling you about. Do,
a = Wild('a', exclude=[pi])
and
b = Wild('a', exclude=[pi]).
and you get
e1.match(a*pi + b)
{a_: 1, b_: x}
b = Wild('b', exclude=[pi])
I wrote a function for dsolve that determine the homogeneous order of
an expression. A function f(x,y) is or order n if f(xt,yt) ==
f(x,y)*t**n. The way that I did this was to pull the additive parts
and determine the order of each part. It is only homogeneous if each
additive part has
On Tue, 26 May 2009 10:38:17 -0600
Aaron S. Meurer asmeu...@gmail.com wrote:
[...]
The problem is that sometimes, I will get something like set(0,
numbers.Zero), which then fails. What would be the best way to
determine the equivalence of things like 1, -1, 0, and Rational(1,2)
Thanks. I think that should do the trick.
Aaron Meurer
On May 26, 2009, at 11:40 AM, Abderrahim Kitouni wrote:
On Tue, 26 May 2009 10:38:17 -0600
Aaron S. Meurer asmeu...@gmail.com wrote:
[...]
The problem is that sometimes, I will get something like set(0,
numbers.Zero), which then
I'm trying to lambdify an expression that involves Ylm and I get the
following error:
x=Symbol('x')
y=Symbol('y')
g=lambdify((x,y),Ylm(3,2,x,y))
g(1.0,1.0)
Traceback (most recent call last):
File input, line 1, in module
File string, line 1, in lambda
TypeError: a float is required
Am I
Out[80]: (-2*s**2*w**2 + w**4)/(s**4 + w**4)
In [81]: _.subs(s,2*pi*I*f)
Out[81]: (8*pi**2*f**2*w**2 + w**4)/(w**4 + 16*pi**4*f**4)
In [82]: simplify(_)
Out[82]: (8*pi**2*f**2*w**2 + w**4)/(w**4 + 16*pi**4*f**4)
Notice that this integrand should be strictly positive. It also should give a
I get the same behavior on my machine. It seems like a bug to me.
Not sure if the bug is in integrate or in simplify, but could you file
this in the issues?
Thanks,
~Luke
On May 26, 12:16 pm, Neal Becker ndbeck...@gmail.com wrote:
Out[80]: (-2*s**2*w**2 + w**4)/(s**4 + w**4)
In [81]:
On Tue, May 26, 2009 at 15:08, Luke hazelnu...@gmail.com wrote:
I get the same behavior on my machine.
Hmm, I don't.
In [1]: from sympy import *
In [2]: %sym f w
Adding variables:
f
w
In [3]: s = 2*pi*I*f
In [4]: ia = (-2*s**2*w**2 + w**4)/(s**4 + w**4)
In [5]: simplify(integrate(ia,
Aaron,
It seems like this only works for Symbol instances, not
FunctionClass instances, i.e:
from sympy import *
x = Function('x')
a = Wild('a', exclude=[pi])
b = Wild('b')
e = pi/S(2) + x
e.match(a*pi + b)
Traceback (most recent call last):
File stdin, line 1, in module
File
On Tuesday 26 May 2009, Robert Kern wrote:
On Tue, May 26, 2009 at 15:08, Luke hazelnu...@gmail.com wrote:
I get the same behavior on my machine.
Hmm, I don't.
I'm using 0.6.4, are you using something newer perhaps?
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You received this
On Tue, May 26, 2009 at 17:04, Neal Becker ndbeck...@gmail.com wrote:
On Tuesday 26 May 2009, Robert Kern wrote:
On Tue, May 26, 2009 at 15:08, Luke hazelnu...@gmail.com wrote:
I get the same behavior on my machine.
Hmm, I don't.
I'm using 0.6.4, are you using something newer perhaps?
On Tuesday 26 May 2009, Robert Kern wrote:
On Tue, May 26, 2009 at 17:04, Neal Becker ndbeck...@gmail.com wrote:
On Tuesday 26 May 2009, Robert Kern wrote:
On Tue, May 26, 2009 at 15:08, Luke hazelnu...@gmail.com wrote:
I get the same behavior on my machine.
Hmm, I don't.
I'm
Strange...it's working now. Sorry for wasting your time!
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OK...now...sorry once again. There seems to be a bug in the lambdify.
When I tried lambdifying Ylm(4,0,t,p) it worked but it does not work
with Ylm(4,1,t,p). I see that Ylm(4,1,t,p) has a exp(I*p) term. So,
when I then try lambdifying exp(I*p) I get an error
Traceback (most recent call last):
I'm using the latest pull from git://git.sympy.org/sympy.git, and this
is the response I get:
In [1]: from sympy import *
In [2]: f, w = symbols('fw')
In [3]: s = 2*pi*I*f
In [4]: ia = (-2*s**2*w**2 + w**4)/(s**4 + w**4)
In [5]: simplify(integrate(ia, (f, 0, infty)))
On Tue, May 26, 2009 at 19:22, Luke hazelnu...@gmail.com wrote:
I'm using the latest pull from git://git.sympy.org/sympy.git, and this
is the response I get:
In [1]: from sympy import *
In [2]: f, w = symbols('fw')
In [3]: s = 2*pi*I*f
In [4]: ia = (-2*s**2*w**2 + w**4)/(s**4 + w**4)
Ok, so there is some sort of bug.
Here is what Matlab (maple) 2008a gives:
int((8*pi^2*f^2*w^2+w^4)/(16*pi^4*f^4+w^4), f, 0, inf)
ans =
PIECEWISE([NaN, And(0 (w^4)^(1/4)*2^(1/2)*pi+pi*(-2*csgn(w^2)*w^2)^
(1/2),(w^4)^(1/4)*2^(1/2)*pi-pi*(-2*csgn(w^2)*w^2)^(1/2) 0,(w^4)^
On Tuesday 26 May 2009, Luke wrote:
Ok, so there is some sort of bug.
Here is what Matlab (maple) 2008a gives:
int((8*pi^2*f^2*w^2+w^4)/(16*pi^4*f^4+w^4), f, 0, inf)
ans =
PIECEWISE([NaN, And(0 (w^4)^(1/4)*2^(1/2)*pi+pi*(-2*csgn(w^2)*w^2)^
I'm trying to better understand how Sympy is structured with regard to
Function and Symbol.
In most problems I have encountered with ODE's (and PDE's, but I'll
limit my discussion to ODE's) of the form:
dx/dt = f(x, t) x \in R^n, f: R^n x R --- R^n
there simply is no closed form solution
What I wrote in the other thread is wrong. You can make x an implicit
function of t. Do
t = Symbol('t')
x = Function('x')(t)
x_ = diff(x, t)
x
x(t)
x_
d
──(x(t))
dt
See the docstring for dsolve.
I agree that typing f(x) and f(x).diff(x) is very time consuming if
you have a lot
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