Status: Accepted
Owner: smi...@gmail.com
Labels: Type-Defect Priority-Medium Printing
New issue 2640 by smi...@gmail.com: uneccessary nesting of exponent
http://code.google.com/p/sympy/issues/detail?id=2640
Rational does not need to be wrapped in parentheses when it is an exponent:
Comment #1 on issue 2640 by smi...@gmail.com: uneccessary nesting of
exponent
http://code.google.com/p/sympy/issues/detail?id=2640
https://github.com/sympy/sympy/pull/556
python(sqrt(2))
'e = 2**Rational(1, 2)'
str(sqrt(2)*x)
'2**(1/2)*x'
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Updates:
Status: Fixed
Comment #3 on issue 2143 by smi...@gmail.com: Test runner does not print
names of XPASSed tests (usually)
http://code.google.com/p/sympy/issues/detail?id=2143
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Comment #4 on issue 2079 by ness...@googlemail.com: multiple integral gives
wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
[I sent this by email while the tracker seemed to be down; sorry if it
comes up twice now.]
There are a couple of problems here, most of which are
Updates:
Labels: NeedsReview
Comment #14 on issue 1066 by ness...@googlemail.com:
sum(1/(x+2)**3,(x,1,oo)) doesn't do it
http://code.google.com/p/sympy/issues/detail?id=1066
This is fixed in gsoc-3: https://github.com/sympy/sympy/pull/543
In [1]: summation(1/(x+2)**3, (x, 1, oo))
Updates:
Labels: NeedsReview
Comment #14 on issue 841 by ness...@googlemail.com:
integrate(exp(-x**2)*exp(I*k*x), (x, -oo, oo)) doesn't calculate the
integral
http://code.google.com/p/sympy/issues/detail?id=841
The definite integral works in gsoc-3
Updates:
Labels: ness987 NeedsReview
Comment #16 on issue 1304 by ness...@googlemail.com: Integrate sqrt(x**2 +
y**2) fails
http://code.google.com/p/sympy/issues/detail?id=1304
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [18]:
Comment #6 on issue 1796 by ness...@googlemail.com: No solution for
integrate(exp(2*b*x)*exp(-a*x**2), x)
http://code.google.com/p/sympy/issues/detail?id=1796
This works exactly the same as issue 841 in gsoc-3. (i.e. the definite
integral works, and the indefinite integrals work if you
Comment #15 on issue 1066 by ness...@googlemail.com:
sum(1/(x+2)**3,(x,1,oo)) doesn't do it
http://code.google.com/p/sympy/issues/detail?id=1066
This is fixed in gsoc-3: https://github.com/sympy/sympy/pull/543
In [1]: summation(1/(x+2)**3, (x, 1, oo))
Out[1]: -9/8 + ζ(3)
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Labels: NeedsReview ness987
Comment #4 on issue 1394 by ness...@googlemail.com:
integrate(x*sqrt(1+2*x), x) can't do it yet
http://code.google.com/p/sympy/issues/detail?id=1394
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543), although
not as prettily as one
Updates:
Labels: NeedsReview ness987
Comment #7 on issue 459 by ness...@googlemail.com: simple double
integration fails
http://code.google.com/p/sympy/issues/detail?id=459
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [36]: integrate(cos(x*y), (x, -pi/2, pi/2),
Comment #5 on issue 2079 by ness...@googlemail.com: multiple integral gives
wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
[I sent this by email while the tracker seemed to be down; sorry if it
comes up twice now.]
There are a couple of problems here, most of which are
Comment #7 on issue 1796 by ness...@googlemail.com: No solution for
integrate(exp(2*b*x)*exp(-a*x**2), x)
http://code.google.com/p/sympy/issues/detail?id=1796
This works exactly the same as issue 841 in gsoc-3. (i.e. the definite
integral works, and the indefinite integrals work if you
Comment #15 on issue 1393 by ness...@googlemail.com: Implement heuristics
for integrating common algebraic functions
http://code.google.com/p/sympy/issues/detail?id=1393
This kind of works in gsoc-3:
In [54]: integrate(x**2 * sqrt(5-x**2), x, meijerg=True)
Out[54]:
⎧
Updates:
Labels: NeedsReview ness987
Comment #1 on issue 1638 by ness...@googlemail.com: integrate (sin(x)/x,
(x, -oo, oo)) returns Integral (fails)
http://code.google.com/p/sympy/issues/detail?id=1638
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [67]:
Updates:
Labels: NeedsReview ness987
Comment #9 on issue 1893 by ness...@googlemail.com: integrate(log(x) *
x**(k-1) * exp(-x) / gamma(k), (x, 0, oo)) hangs
http://code.google.com/p/sympy/issues/detail?id=1893
This mostly works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In
Comment #10 on issue 1893 by ness...@googlemail.com: integrate(log(x) *
x**(k-1) * exp(-x) / gamma(k), (x, 0, oo)) hangs
http://code.google.com/p/sympy/issues/detail?id=1893
This mostly works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [78]: a = Symbol('a', positive=True)
In
Updates:
Labels: NeedsReview
Comment #12 on issue 2624 by ness...@googlemail.com: Sympy 0.7.1 can't
integrate Gaussians
http://code.google.com/p/sympy/issues/detail?id=2624
as reported before, this works in gsoc-3 which is now up for review:
https://github.com/sympy/sympy/pull/543
Comment #3 on issue 1088 by ness...@googlemail.com:
integrate(log(x)*exp(x), (x, 0, oo)) should return -EulerGamma
http://code.google.com/p/sympy/issues/detail?id=1088
the original integral of this issue does not even exist. Maybe exp(-x) was
meant instead? in gsoc-3:
In [90]:
Updates:
Labels: NeedsReview ness987
Comment #5 on issue 1388 by ness...@googlemail.com: integrate(exp(-x)*x**n,
x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
In gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [96]: integrate(x**n*exp(-x), x, meijerg=True)
Updates:
Labels: NeedsBetterPatch
Comment #2 on issue 2640 by asmeurer: uneccessary nesting of exponent
http://code.google.com/p/sympy/issues/detail?id=2640
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Comment #6 on issue 2079 by asmeurer: multiple integral gives wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
So, this integral needs to be fixed, and the issues you address above
should be fixed, but the problem here is rather unrelated. There was a bug
in the way
Comment #7 on issue 2079 by ness...@googlemail.com: multiple integral gives
wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
I fixed the _eval_interval() handling issue in gsoc-3 and added a test. I
also fixed everything I said I would fix (and added tests).
I will open
Status: Accepted
Owner: ness...@googlemail.com
Labels: Type-Defect Priority-Medium Series
New issue 2641 by ness...@googlemail.com: limit() heuristics are wrong
http://code.google.com/p/sympy/issues/detail?id=2641
In [10]: limit(log(x)/z - log(2*x)/z, x, 0)
Out[10]:
2⋅zoo
─
z
In [11]:
Updates:
Labels: NeedsReview
Comment #8 on issue 2079 by asmeurer: multiple integral gives wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
See https://github.com/sympy/sympy/pull/559 for the test.
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Comment #8 on issue 459 by ness...@googlemail.com: simple double
integration fails
http://code.google.com/p/sympy/issues/detail?id=459
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [36]: integrate(cos(x*y), (x, -pi/2, pi/2), (y, 0, pi))
Out[36]:
⎛ 2⎞
⎜π ⎟
Comment #8 on issue 1796 by ness...@googlemail.com: No solution for
integrate(exp(2*b*x)*exp(-a*x**2), x)
http://code.google.com/p/sympy/issues/detail?id=1796
This works exactly the same as issue 841 in gsoc-3. (i.e. the definite
integral works, and the indefinite integrals work if you
Status: Accepted
Owner: ness...@googlemail.com
Labels: Type-Defect Priority-Medium
New issue 2642 by ness...@googlemail.com: Complicated multiple integral
http://code.google.com/p/sympy/issues/detail?id=2642
Compare issue 2079.
We would like to do integrate(sin(x*y*z), (x, 0, pi), (y, 0, pi),
Issue 2641: limit() heuristics are wrong
http://code.google.com/p/sympy/issues/detail?id=2641
This issue is now blocking issue 2642.
See http://code.google.com/p/sympy/issues/detail?id=2642
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Comment #9 on issue 459 by ness...@googlemail.com: simple double
integration fails
http://code.google.com/p/sympy/issues/detail?id=459
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [36]: integrate(cos(x*y), (x, -pi/2, pi/2), (y, 0, pi))
Out[36]:
⎛ 2⎞
⎜π ⎟
Comment #9 on issue 2079 by ness...@googlemail.com: multiple integral gives
wrong result
http://code.google.com/p/sympy/issues/detail?id=2079
Compare new issues 2641 (limit) and 2642 (original integral).
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Comment #16 on issue 1393 by ness...@googlemail.com: Implement heuristics
for integrating common algebraic functions
http://code.google.com/p/sympy/issues/detail?id=1393
This kind of works in gsoc-3:
In [54]: integrate(x**2 * sqrt(5-x**2), x, meijerg=True)
Out[54]:
⎧
Comment #10 on issue 459 by ness...@googlemail.com: simple double
integration fails
http://code.google.com/p/sympy/issues/detail?id=459
This works in gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [36]: integrate(cos(x*y), (x, -pi/2, pi/2), (y, 0, pi))
Out[36]:
⎛ 2⎞
⎜π ⎟
Updates:
Status: Fixed
Comment #5 on issue 1718 by smi...@gmail.com: re-writing of sums and
products
http://code.google.com/p/sympy/issues/detail?id=1718
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Comment #15 on issue 841 by asmeurer: integrate(exp(-x**2)*exp(I*k*x), (x,
-oo, oo)) doesn't calculate the integral
http://code.google.com/p/sympy/issues/detail?id=841
Yes, now that we have the Meijer G method, there is little sense in writing
table lookup heuristics for this.
Regarding
Comment #16 on issue 841 by asmeurer: integrate(exp(-x**2)*exp(I*k*x), (x,
-oo, oo)) doesn't calculate the integral
http://code.google.com/p/sympy/issues/detail?id=841
By the way, are you adding tests for these integrals in your branch?
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Comment #9 on issue 1796 by ness...@googlemail.com: No solution for
integrate(exp(2*b*x)*exp(-a*x**2), x)
http://code.google.com/p/sympy/issues/detail?id=1796
This works exactly the same as issue 841 in gsoc-3. (i.e. the definite
integral works, and the indefinite integrals work if you
Comment #11 on issue 1893 by asmeurer: integrate(log(x) * x**(k-1) *
exp(-x) / gamma(k), (x, 0, oo)) hangs
http://code.google.com/p/sympy/issues/detail?id=1893
So combsimp() isn't being called in the right order, or it's just not
working?
I deleted your duplicate comment.
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Comment #13 on issue 2624 by asmeurer: Sympy 0.7.1 can't integrate Gaussians
http://code.google.com/p/sympy/issues/detail?id=2624
By the way, also add a test for the integral from that paper.
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Updates:
Cc: ness...@googlemail.com
Comment #3 on issue 1792 by asmeurer: SymPy does not integrate a real power
of sine/cosine
http://code.google.com/p/sympy/issues/detail?id=1792
Tom, can we make this work. I tried it in your branch and it still doesn't
work there.
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Comment #1 on issue 2642 by asmeurer: Complicated multiple integral
http://code.google.com/p/sympy/issues/detail?id=2642
The symbolic output of WolframAlpha is a little different, but the
numerical result is the same. If your symbolic result is correct, it's
actually a little nicer because
Updates:
Status: Fixed
Comment #2 on issue 2538 by smi...@gmail.com: latex printer should use
\iint for multiple integrals
http://code.google.com/p/sympy/issues/detail?id=2538
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Updates:
Status: Duplicate
Mergedinto: 841
Comment #10 on issue 1796 by asmeurer: No solution for
integrate(exp(2*b*x)*exp(-a*x**2), x)
http://code.google.com/p/sympy/issues/detail?id=1796
That issue is basically the same as this one. I'd say merge.
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Comment #17 on issue 841 by asmeurer: integrate(exp(-x**2)*exp(I*k*x), (x,
-oo, oo)) doesn't calculate the integral
http://code.google.com/p/sympy/issues/detail?id=841
Issue 1796 has been merged into this issue.
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Comment #2 on issue 2629 by smi...@gmail.com: Canonical powers
http://code.google.com/p/sympy/issues/detail?id=2629
The beta of this powsimp functionality is in my 'and' branch.
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Updates:
Summary: Ways to print Rationals so that they are copy-pastable
Status: Accepted
Labels: -NeedsReview
Comment #7 on issue 2359 by asmeurer: Ways to print Rationals so that they
are copy-pastable
http://code.google.com/p/sympy/issues/detail?id=2359
This was
Comment #8 on issue 2359 by asmeurer: Ways to print Rationals so that they
are copy-pastable
http://code.google.com/p/sympy/issues/detail?id=2359
By the way, I think powers do denest if you do it in the right order:
In [3]: sqrt(x**3)
Out[3]: sqrt(x**3)
In [4]: sqrt(x)**3
Out[4]: x**(3/2)
Status: Accepted
Owner: asmeurer
Labels: Type-Enhancement Priority-Medium
New issue 2643 by asmeurer: Create a root() function
http://code.google.com/p/sympy/issues/detail?id=2643
We should have a root() function, which is a shortcut to rational roots.
It would work like root(expr, a) ==
Updates:
Blockedon: 2643
Comment #9 on issue 2359 by asmeurer: Ways to print Rationals so that they
are copy-pastable
http://code.google.com/p/sympy/issues/detail?id=2359
See issue 2643 for the root() function.
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Issue 2643: Create a root() function
http://code.google.com/p/sympy/issues/detail?id=2643
This issue is now blocking issue 2359.
See http://code.google.com/p/sympy/issues/detail?id=2359
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Comment #2 on issue 2642 by asmeurer: Complicated multiple integral
http://code.google.com/p/sympy/issues/detail?id=2642
By risch do you mean the full Risch algorithm or the heuristic Risch
algorithm? For heurisch() it may or may not work without expansion, just
like meijerint. For the
Updates:
Status: Fixed
Comment #2 on issue 1391 by asmeurer: integrate(cos(x)*f(x),(x,0,y)) gives
wrong result
http://code.google.com/p/sympy/issues/detail?id=1391
This works correctly now:
In [1]: integrate(cos(x)*f(x),(x,0,y))
Out[1]:
y
⌠
⎮ f(x)⋅cos(x) dx
⌡
0
In [2]:
Updates:
Labels: Concrete
Comment #3 on issue 2637 by asmeurer: Unicode Sigma for pretty printed Sum
http://code.google.com/p/sympy/issues/detail?id=2637
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Owner: ---
Labels: Printing
Comment #18 on issue 447 by asmeurer: pprint: unicode fonts
http://code.google.com/p/sympy/issues/detail?id=447
I was about to close this as old and irrelevant, when I noticed that the
character I used in issue 2637 is not being used in our
Updates:
Summary: Better unicode square root
Labels: -Type-Defect Type-Enhancement
Comment #19 on issue 447 by asmeurer: Better unicode square root
http://code.google.com/p/sympy/issues/detail?id=447
Here's a screen shot of how it looks in my terminal. The one on top is how
Updates:
Labels: NeedsReview smichr
Comment #3 on issue 2629 by smi...@gmail.com: Canonical powers
http://code.google.com/p/sympy/issues/detail?id=2629
and now in a pull request
https://github.com/sympy/sympy/pull/561
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Comment #21 on issue 447 by asmeurer: Better unicode square root
http://code.google.com/p/sympy/issues/detail?id=447
By the way, the font I'm using is DejaVu Sans Mono. I don't know if things
have changed since comment 12, but this is by far the best font I've found
for unicode pretty
Comment #4 on issue 2637 by asmeurer: Unicode Sigma for pretty printed Sum
http://code.google.com/p/sympy/issues/detail?id=2637
This *almost* looks good:
n
__
╲
〉 f(k)
╱
‾‾
k = 1
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Comment #5 on issue 2637 by asmeurer: Unicode Sigma for pretty printed Sum
http://code.google.com/p/sympy/issues/detail?id=2637
That's probably just a coincidence, though, since that angle character
isn't actually coming from the same font as the rest of the characters on
my machine. If I
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