Comment #6 on issue 2265 by smi...@gmail.com: cse requires subexpressions
to be in the exact same order
http://code.google.com/p/sympy/issues/detail?id=2265
That's because I required it to be a Mul...let's see what happens when I
check for either Mul or Add. I'll report back in a few
Comment #8 on issue 2265 by smi...@gmail.com: cse requires subexpressions
to be in the exact same order
http://code.google.com/p/sympy/issues/detail?id=2265
Hey...there are two x0 there! In comment 1, too. That's not right.
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Comment #8 on issue 2270 by pr...@goodok.ru: Matrix(...) + scalar
http://code.google.com/p/sympy/issues/detail?id=2270
For all your information: in Sage (better etalon than numpy) the adding of
square matrix and scalar is permitted. In other cases the TypeError is
excepted.
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Comment #18 on issue 2269 by pr...@goodok.ru: Symplification of
transformation P applying to diagonal matrix.
http://code.google.com/p/sympy/issues/detail?id=2269
Sorry for CC email changing. I took a pattern from issue 2252 (comment 17)
In addition 500 errors began to appear in google
Comment #9 on issue 2270 by sherjilo...@gmail.com: Matrix(...) + scalar
http://code.google.com/p/sympy/issues/detail?id=2270
@Andy : An eye is an Idenity matrix so obviously it will add only to the
diagonal. Its `ones` that would add to all the elements.
The eye version is mathematically
Comment #1 on issue 2274 by pr...@goodok.ru: Matrix generators
http://code.google.com/p/sympy/issues/detail?id=2274
We have zeros, ones and eye.
And diag() constructor
If you want to concentrate at constructors of random matrices you can take
into account how Sage solve this [1] for
Comment #9 on issue 1822 by sherjilo...@gmail.com: Matrix
Object.nonexistantattribute() should raise more informative AttributeError
http://code.google.com/p/sympy/issues/detail?id=1822
How about this ?
In [1]: A=ones(3)
In [2]: A.d
Updates:
Labels: NeedsDecision
Comment #10 on issue 1822 by sherjilo...@gmail.com: Matrix
Object.nonexistantattribute() should raise more informative AttributeError
http://code.google.com/p/sympy/issues/detail?id=1822
(No comment was entered for this change.)
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Comment #3 on issue 2220 by sherjilo...@gmail.com: Bug with
Matrix.is_symbolic and Matrix.is_upper
http://code.google.com/p/sympy/issues/detail?id=2220
This has been pushed in. We should close this. I'll raise a separate issue
for something that concerns this.
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Status: Accepted
Owner: sherjilo...@gmail.com
Labels: Type-Defect Priority-Medium
New issue 2275 by sherjilo...@gmail.com: is_upper and is_lower should imply
that the matrix is square
http://code.google.com/p/sympy/issues/detail?id=2275
I assume upper and lower are short forms for upper
Updates:
Labels: Matrices EasyToFix
Comment #1 on issue 2275 by sherjilo...@gmail.com: is_upper and is_lower
should imply that the matrix is square
http://code.google.com/p/sympy/issues/detail?id=2275
(No comment was entered for this change.)
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Comment #2 on issue 2275 by pr...@goodok.ru: is_upper and is_lower should
imply that the matrix is square
http://code.google.com/p/sympy/issues/detail?id=2275
BTW the reason to return False (opposite to raising error exception) is
that these methods (`is_something`) are prober methods
Comment #3 on issue 2275 by sherjilo...@gmail.com: is_upper and is_lower
should imply that the matrix is square
http://code.google.com/p/sympy/issues/detail?id=2275
So, basically if the user wants lower triangular matrix, he'll check for
square and lower both separately. That's okay too.
Comment #8 on issue 1077 by Vinzent.Steinberg: pi, EulerGamma in Algebraic
http://code.google.com/p/sympy/issues/detail?id=1077
Maybe we should rather remove this function completely, because it is very
hard to determine whether a number algebraic or not.
For example, sin(1) is not
Updates:
Status: Fixed
Labels: -NeedsReview PassedReview
Comment #4 on issue 2220 by Vinzent.Steinberg: Bug with Matrix.is_symbolic
and Matrix.is_upper
http://code.google.com/p/sympy/issues/detail?id=2220
Thanks.
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Updates:
Status: NeedsDecision
Labels: -NeedsDecision
Comment #11 on issue 1822 by ronan.l...@gmail.com: Matrix
Object.nonexistantattribute() should raise more informative AttributeError
http://code.google.com/p/sympy/issues/detail?id=1822
I think we should just get rid of
Comment #9 on issue 2265 by smi...@gmail.com: cse requires subexpressions
to be in the exact same order
http://code.google.com/p/sympy/issues/detail?id=2265
It turns out that it's not that bad to check for such sub-matches:
h[1] cse([a + c + e, a + c + b])
([(x0, a + c)], [e + x0,
Comment #3 on issue 1400 by smi...@gmail.com: make cse optionally not to
generate subexpressions that are only used once
http://code.google.com/p/sympy/issues/detail?id=1400
There is no option for this, but the recent commit now gives:
h[1] a1, a2, a3, a4, a5, a6 =
symbols([a1, a2,
Updates:
Cc: matt...@gmail.com
Comment #9 on issue 1077 by asmeurer: pi, EulerGamma in Algebraic
http://code.google.com/p/sympy/issues/detail?id=1077
I think it is worthy to have it. While it will have to return None in
quite a few cases, there are several cases where it can return
Updates:
Summary: Remove Matrix.__getattr__
Comment #12 on issue 1822 by asmeurer: Remove Matrix.__getattr__
http://code.google.com/p/sympy/issues/detail?id=1822
I agree. There is no reason to have it.
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Comment #9 on issue 1001 by sapta.ii...@gmail.com: Failure with definite
integral of sqrt(R^2-x^2) and variations
http://code.google.com/p/sympy/issues/detail?id=1001
In master you can try
import sympy
x=Symbol('x')
R=Symbol('R', positive = True)
integrate(sqrt(R**2-x**2), (x, 0, R))
Comment #1 on issue 2276 by asmeurer: integrate() should use the ode
module's undetermined coefficients solver when possible
http://code.google.com/p/sympy/issues/detail?id=2276
By the way, integrate() should return whatever you get by setting all the
constants equal to 0 (unless we
Comment #3 on issue 1604 by smi...@gmail.com: Misapplication of integration
by parts
http://code.google.com/p/sympy/issues/detail?id=1604
This appears to be fixed:
h[5] integrate(exp(x)*g(x), x)
Integral(exp(x)*g(x), x)
Can't bisect at the moment to see what fixed it.
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Status: Accepted
Owner: smi...@gmail.com
Labels: Type-Defect Priority-Medium Integration
New issue 2277 by smi...@gmail.com: integrate(3 + exp(1/x**2), x) doesn't
return successful parts.
http://code.google.com/p/sympy/issues/detail?id=2277
integrate takes and all or nothing approach.
Comment #3 on issue 2276 by smi...@gmail.com: integrate() should use the
ode module's undetermined coefficients solver when possible
http://code.google.com/p/sympy/issues/detail?id=2276
So would the _eval_integral routine just have to look for a
NotImplementedError to know if it failed?
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