Status: Started
Owner:
Labels: Type-Defect Priority-Medium NeedsReview smichr
New issue 3844 by smi...@gmail.com: rewriting of trigonometric functions
needs to be more robust in solve
http://code.google.com/p/sympy/issues/detail?id=3844
A solution should be obtained for this:
Updates:
Labels: -NeedsBetterPatch NeedsReview
Comment #10 on issue 3149 by smi...@gmail.com: solve() could attempt
logcombine when looking for solutions
http://code.google.com/p/sympy/issues/detail?id=3149
ok, eq in comment 9 works with or without force
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Updates:
Status: Fixed
Comment #3 on issue 3843 by smi...@gmail.com: value for quart constant is
wrong in physics.units
http://code.google.com/p/sympy/issues/detail?id=3843
(No comment was entered for this change.)
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Comment #11 on issue 3149 by smi...@gmail.com: solve() could attempt
logcombine when looking for solutions
http://code.google.com/p/sympy/issues/detail?id=3149
correction to comment 10 - solves with force=True
And the OP expressions behave as follows:
dsolve(2*x*f(x) + (x**2 +
Updates:
Status: Fixed
Comment #3 on issue 2709 by smi...@gmail.com: logcombine isn't as simple as
it could be
http://code.google.com/p/sympy/issues/detail?id=2709
logcombine(log(2)/(log(x)+log(y)))
log(2**(1/log(x*y)))
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Updates:
Blockedon: sympy:1981
Comment #12 on issue 2830 by smi...@gmail.com: checkodesol needs to use
force
http://code.google.com/p/sympy/issues/detail?id=2830
The OP expression gives
var('C1')
var('x', real=True)
eq3 = f(x) + (x*log(f(x)/x) - 2*x)*diff(f(x),x)
sol3 = Eq(f(x),
Comment #5 on issue 1981 by smi...@gmail.com: lambert simplifications
http://code.google.com/p/sympy/issues/detail?id=1981
These simplifications have not been added to master. They should be added
somewhere or else expressions that should simplify to zero won't. (e.g.
issue 2830)
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Issue 1981: lambert simplifications
http://code.google.com/p/sympy/issues/detail?id=1981
This issue is now blocking issue sympy:2830.
See http://code.google.com/p/sympy/issues/detail?id=2830
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Comment #13 on issue 2830 by smi...@gmail.com: checkodesol needs to use
force
http://code.google.com/p/sympy/issues/detail?id=2830
making checkodesol more aggressive is implemented in
https://github.com/sympy/sympy/pull/1964
If that is committed, this Summary should be changed to
Updates:
Labels: NeedsReview smichr
Comment #14 on issue 2830 by smi...@gmail.com: checkodesol needs to use
force
http://code.google.com/p/sympy/issues/detail?id=2830
(No comment was entered for this change.)
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Comment #19 on issue 797 by smi...@gmail.com: Should Lambda accept
Functions as variables?
http://code.google.com/p/sympy/issues/detail?id=797
If a function is detected, Subs can be used to deal with it:
H = Lambda(y, Derivative(Subs(u, u, y), x, x) + x**2 * y)
H(f(x)).doit()
x**2*f(x) +
Comment #6 on issue 3826 by smi...@gmail.com: trigsimp can't reverse tan
double angle formula
http://code.google.com/p/sympy/issues/detail?id=3826
It's not excruciatingly slow...this can be tested by changing futrig to fu
in the trigsimpfunc dictionary. One thing we could do is make fu the
Comment #7 on issue 3826 by asmeu...@gmail.com: trigsimp can't reverse tan
double angle formula
http://code.google.com/p/sympy/issues/detail?id=3826
Let's try that.
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Comment #9 on issue 3685 by a...@hirzel.us: Rewrite ODE docstrings using
LaTeX
http://code.google.com/p/sympy/issues/detail?id=3685
More than half done, comments appreciated:
https://github.com/alhirzel/sympy/commit/6dfeca0d59a9d10bcd422347886376c57aa39532
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Updates:
Status: Fixed
Comment #1 on issue 3258 by smi...@gmail.com: AssertionError in dsolve()
http://code.google.com/p/sympy/issues/detail?id=3258
This appears to be working
var('xp');b1=Function('f');dsolve(-b1(x) - (x - xp)*b1(x).diff(x) +
q(x), b1(x))
xp
f(x) == (C1 -
Status: Valid
Owner:
Labels: Type-Defect Priority-Medium
New issue 3845 by smi...@gmail.com: dsolve gives different answers
http://code.google.com/p/sympy/issues/detail?id=3845
in PR 1964 I worked around different forms of the solution of an ode that
are being returned. I didn't track
Updates:
Status: Fixed
Comment #3 on issue 3783 by smi...@gmail.com: Prufer.edges test depends on
order of set
http://code.google.com/p/sympy/issues/detail?id=3783
fixed in a73a4ade523845a271676ac392196c41483baab3
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Comment #35 on issue 3809 by smi...@gmail.com: isprime can be faster
http://code.google.com/p/sympy/issues/detail?id=3809
See http://www.trnicely.net/misc/bpsw.html for discussion about a test that
combines Miller-Rabil with Lucas-Lehmer.
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Comment #36 on issue 3809 by smi...@gmail.com: isprime can be faster
http://code.google.com/p/sympy/issues/detail?id=3809
See http://www.trnicely.net/misc/bpsw.html for discussion about a test that
combines a single Miller-Rabin tests with the Lucas-Lehmer test.
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Comment #11 on issue 2814 by smi...@gmail.com: ValueError: can't raise
polynomial to a negative power with solve()
http://code.google.com/p/sympy/issues/detail?id=2814
The OP expression still hangs and the expression in comment 8 still raises
an error.
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