Hello.
>>> in Mathematica I can just do expr /.{x_*Conj[x_] -> Abs[x]^2}
With an easy to use treeview class, I do not think that it will be too hard
to implement a method that can acheive this kind of using something like
expr.replace(x_*Conj[x_], Abs[x]^2)
Christophe BAL
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By the way, I discovered another counter-example. Expressions like
a**2*conjugate(a)
are not transformed to
a*abs(a)**2
About the friendly treeview class, I agree and hope its coming soon :) is
it in the works?
On Saturday, June 7, 2014 7:04:22 PM UTC+2, Christophe Bal wrote:
>
> Hello.
>
> >
The point is that the current pattern matcher only matches exact subtrees
starting at one node, i.e. the tree of that node has to be matched entirely,
while in many cases partial subtree matches would be desired.
In any case the expression to_abs can be further simplified. Try something like
th
Sorry instead of rl try to put lambda x: next(rl(x)) into the exhaust ( ... )
expression.
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I think what you're getting is a generalized Lambert series. Notice
that one of the terms is 1/x.
Aaron Meurer
On Wed, Jun 4, 2014 at 11:01 AM, su225 wrote:
> Hello. I'm new to sympy and took the tutorial today. But I noticed the
> following error. I'm glad to contribute to this project.
> Where
> I think that SymPy needs a better term rewriting system. And also a
better pattern matcher.
@Franz Are you interested in doing work in this area?
On Sat, Jun 7, 2014 at 10:39 AM, F. B. wrote:
> Sorry instead of rl try to put lambda x: next(rl(x)) into the exhaust (
> ... ) expression.
>
> -
Also I'm glad to see people using strategies. I've since pulled it out to
an external package. Although this wouldn't support SymPy tree traversals
like bottom_up without slightly more work.
https://github.com/logpy/strategies
On Sat, Jun 7, 2014 at 6:38 PM, Matthew Rocklin wrote:
> > I thin
The series exists, and has the 1/x term in general, but it is missing
the shift by pi/2:
http://www.wolframalpha.com/input/?i=tan%28x%29+series+at+x%3Dpi%2F2
So I think there is a bug.
Ondrej
On Sat, Jun 7, 2014 at 1:23 PM, Aaron Meurer wrote:
> I think what you're getting is a generalized Lam
1. How do I ensure methods like 'trigsimp' work with these classes?
Currently, passing a vector like *(sin(a)+cos(a))**2*i - j* to trigsimp
returns the correct answer mathematically, _but_ the instance is of type
Add (instead of the expected VectorAdd). How do I prevent this?
I ran into this when
yes, there is a bug. the terms should start..
- 1/(x-pi/2) + (x-pi/2)/3 +
On Saturday, June 7, 2014 9:02:19 PM UTC-7, Ondřej Čertík wrote:
>
> The series exists, and has the 1/x term in general, but it is missing
> the shift by pi/2:
>
> http://www.wolframalpha.com/input/?i=tan%28x%29+se
I see your point. But in that case, would the API remain the same? What you
suggest, would involve either-
A. modifying the code for trigsimp itself
or
B. having a 'trigsimp' method in Vector itself (already done this)
On Sun, Jun 8, 2014 at 11:26 AM, Matthew Rocklin wrote:
> 1. How do I e
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