Comment #2 on issue 2559 by pedrocru...@gmail.com: lack definite integral
of |x^2-1|
http://code.google.com/p/sympy/issues/detail?id=2559
I'm also a Sagemath user and that's why I wrote ^ instead of the
Python/SymPy correct form **. The assertion integrate(abs(expr)) ==
Comment #24 on issue 1816 by ronan.l...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
If we're talking about elementary calculus, then deriving wrt a function
doesn't make sense. We already have
Comment #25 on issue 1816 by elliso...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
I don't have any further time to put into arguing about the deep
mathematics of these derivatives. I feel like
Comment #26 on issue 1816 by asmeurer: Adding partial derivatives and
taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
OK, I think I get it now (after comment 23 it clicked for me).
So I think I am +1 to this now, even with the strange
Status: Accepted
Owner: asmeurer
Labels: Type-Defect Priority-Medium
New issue 2560 by asmeurer: Id should be a Singleton
http://code.google.com/p/sympy/issues/detail?id=2560
In [35]: a = Lambda(x, x)
In [36]: b = Lambda(y, y)
In [37]: a
Out[37]: Lambda(_x, _x)
In [38]: b
Out[38]: Lambda(_x,
Comment #27 on issue 1816 by Vinzent.Steinberg: Adding partial derivatives
and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
Can you cite an example of somewhere where this is computed as so with
the Lagrangian?
The simplest possible
Status: Accepted
Owner: asmeurer
CC: matt...@gmail.com
Labels: Type-Enhancement Priority-Medium Documentation
New issue 2561 by asmeurer: Add a link to the source next to function
definitions in the docs
http://code.google.com/p/sympy/issues/detail?id=2561
It was just suggested to me on IRC
Comment #28 on issue 1816 by elliso...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
The Falling Mass example here shows this, in that diff(L, x(t)) == mg,
which assumes that the derivative you
Comment #29 on issue 1816 by asmeurer: Adding partial derivatives and
taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
OK, that is evidence enough for me. And this would assumedly extend to
diff(f(x), x, n).diff(diff(f(x), x, m)) ==
Comment #30 on issue 1816 by ronan.l...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
There's absolutely no need here to compute diff(x', x) (whatever that
means). x and x' are separate,
Comment #1 on issue 2560 by ronan.l...@gmail.com: Id should be a Singleton
http://code.google.com/p/sympy/issues/detail?id=2560
It's called S.IdentityFunction.
--
You received this message because you are subscribed to the Google Groups
sympy-issues group.
To post to this group, send email to
Updates:
Status: Invalid
Comment #2 on issue 2560 by asmeurer: Id should be a Singleton
http://code.google.com/p/sympy/issues/detail?id=2560
Oh OK. And we do not have for example S.oo.
By the way, the printing of this object should be improved.
--
You received this message because you
Comment #31 on issue 1816 by Vinzent.Steinberg: Adding partial derivatives
and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
Sorry, I don't get your point. Why can't we consider diff(x'(t), x(t)) as
diff(x', x)? Let's say they are just
Comment #32 on issue 1816 by ronan.l...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
The problem is that in the conventional presentation of Lagrangian
mechanics, we use the same name for
Comment #24 on issue 1026 by renato.c...@gmail.com: pypy doesn't run sympy
http://code.google.com/p/sympy/issues/detail?id=1026
The piecewise failure is due to the ordering of the expression args. The
two sides of the assert equality are equivalent. We can test for both
cases, or we can
Comment #25 on issue 1026 by asmeurer: pypy doesn't run sympy
http://code.google.com/p/sympy/issues/detail?id=1026
How would solving the issue of recognizing that the inner Piecewise is
never reached solve the issue of arg order? Are you sure it wouldn't just
solve it for this one specific
Comment #34 on issue 1816 by ronan.l...@gmail.com: Adding partial
derivatives and taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
In formal mathematics, Lagrangian mechanics is presented in terms of stuff
like differential manifolds and
Comment #35 on issue 1816 by asmeurer: Adding partial derivatives and
taking derivatives with respect to functions
http://code.google.com/p/sympy/issues/detail?id=1816
From that Wikipedia page you reference: However, all that is meant by this
notation is the derivative of the function
18 matches
Mail list logo
