Hi guys,
I am having trouble translating a one-liner from Mathematica to Sympy. The
problem in question is explained in detail in this post:
http://mathematica.stackexchange.com/questions/24794/symbolic-manipulation-of-functional-form
I am currently trying to implement the second answer (becaus
Was this implemented into sympy at any point? It could be the equivalent of
Mathematica's CoefficientArrays function.
On Thursday, November 14, 2013 5:56:22 AM UTC+1, Chris Smith wrote:
>
> I forgot that as_independent, without the as_Add=True flag will treat Muls
> differently. The following wi
I have the following expression in sympy:
"Add(Mul(Integer(-1), Integer(2), Symbol('g'), Symbol('psi^ss_1'),
conjugate(Symbol('psi^ss_1'))), Mul(Integer(-1), Integer(2), Symbol('g'),
Symbol('psi^ss_2'), conjugate(Symbol('psi^ss_2'))), Symbol('omega_2'),
Mul(Integer(-1), Rational(1, 2), Pow(Symb
__ ___(-k + k₂)
>> - 2⋅g⋅ψ_1__ss⋅ψ_1__ss - 2⋅g⋅ψ_2__ss⋅ψ_2__ss + ω₂ - ──
>> 2⋅m
>>
>> In [3]: import re
>>
>> In [4]: eval(re.sub(r"(?PSymbol\('[^']+'\)
unchanged :)
On Friday, June 6, 2014 1:07:26 PM UTC+2, F. B. wrote:
>
>
>
> On Friday, June 6, 2014 12:22:14 PM UTC+2, Andrei Berceanu wrote:
>>
>> Tnx!
>> I think there is an error in the line (unbalanced paranthesis):
>>
>> return node.xreplace ({e: S.One, co
The unflatten_mul function factorized the 2, but not the g, i.e. it returns
2(g*|psi1|**2 + g*|psi2|**2)
instead of
2g*(|psi1|**2 + |psi2|**2)
On Friday, June 6, 2014 1:07:26 PM UTC+2, F. B. wrote:
>
>
>
> On Friday, June 6, 2014 12:22:14 PM UTC+2, Andrei Berceanu wrote:
>>
lo.
>
> All the receipts in this dicussion look very interesting.Maybe all of this
> ones could be put in the official documentation.
>
>
> Christophe BAL
>
>
> 2014-06-06 13:34 GMT+02:00 Andrei Berceanu >:
>
>> The unflatten_mul function factorized the 2,
Well yes, but that doesn´t change the fact that in Mathematica I can just do
expr /.{x_*Conj[x_] -> Abs[x]^2}
and it just works!
On Friday, June 6, 2014 8:59:56 PM UTC+2, Christophe Bal wrote:
>
> A easy to use treeview will be a great tool. No ?
>
>
> 2014-06-06 19:52 GMT+02:00 F. B. >:
>
>> I
(c)*Abs(d)**2
instead of the expected
Abs(a)**2*Abs(b)**2 + Abs(c)**2*Abs(d)**2
It does what I want if I apply it two times, though.
On Friday, June 6, 2014 9:49:22 PM UTC+2, Andrei Berceanu wrote:
>
> Well yes, but that doesn´t change the fact that in Mathematica I can just
> do
>
>
I define a function gamma with the following code:
from sympy import *
x = Symbol('x')
class gamma(Function): pass
Its latex representation is
print latex(gamma(x))
\Gamma\left(x\right)
whereas I would like it to be
\gamma\left(x\right)
i.e. lowercase instead of capital.
How can I achieve
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.
>
> >
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