Status: Accepted
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Labels: Type-Defect Priority-Medium
New issue 1657 by ondrej.certik: integrate(1/x, x) should return log(abs(x))
http://code.google.com/p/sympy/issues/detail?id=1657
In [1]: integrate(1/x, x)
Out[1]: log(x)
but it should return log(abs(x)), imho.
--
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Status: New
Owner:
Labels: Type-Defect Priority-Medium
New issue 1658 by renato.c...@gmail.com: [PATCH] derivatives of complex
functions re, im, abs and arg don't evaluate correctly
http://code.google.com/p/sympy/issues/detail?id=1658
In [1]: Derivative(re(f(x)), x, **{'evaluate': True})
The methods you suggest essentially takes care of the mass matrix
problem by solving a linear system numerically during numerical
integration. I am familiar with tools out there that do this, but
this isn't what I'm looking to do. I haven't seen one that is written
directly usable in Python --
Alan,
For the systems I have studied at the moment, the most complicated
inverses I have need to compute are 3x3 dense matrices (for the
nonlinear equations of motion of a benchmark bicycle model [0]) and
6x6 sparse inverses (for solving the kinematic equations of motion for
the derivatives of
On Sep 30, 8:39 am, Luke hazelnu...@gmail.com wrote:
The methods you suggest essentially takes care of the mass matrix
problem by solving a linear system numerically during numerical
integration. I am familiar with tools out there that do this, but
this isn't what I'm looking to do. I
On Tue, Sep 29, 2009 at 4:03 PM, Luke hazelnu...@gmail.com wrote:
On Sep 29, 1:09 pm, Ondrej Certik ond...@certik.cz wrote:
On Tue, Sep 29, 2009 at 12:49 PM, Luke hazelnu...@gmail.com wrote:
I'm using Sympy from within PyDy to generate the equations of motion for
mechanical systems. At
Hi Jorn!
On Tue, Sep 29, 2009 at 3:03 PM, Jorn Baayen jorn.baa...@gmail.com wrote:
Dear all,
This is just a short notice to let you know about a little project of mine
that should hopefully be useful to others. I've
been hacking Reinteract (reinteract.org, an interactive Python shell which
