[SciPy-user] Green's function
Tue Dec 11 10:52:19 CST 2007
There is no particular special function called the
Green Function (sometimes named Green's Function).
Green functions are special solutions of certain
partial differential equations (PDE), i.e. they are a
certain class of functions. It's like saying
Orthogonal Polynomials -- that's a class, not a
Green functions have the property that when used in
the PDE they yield a Dirac delta function. That makes
them useful for the solution of the same PDE, but with
a nonhomogeneous term added to the "other side."
So each PDE has it's own Green function. Eg. the
D^2 G + k^2 G=0 (D^2 = Laplacian)
has the Green function G(r,r')= i H_0(k|r'-r|)/4,
where H_0 is a Hankel function and i=sqrt(-1).
I suggest you look at some texts (maybe mathematical
physics books) for the subject. Even a Google search
will give you some information.
-- Lou Pecora
--- Natali Melgarejo Diaz <firstname.lastname@example.org>
> Hi to everyone i'm new in this list...i have a
> question about a
> formula i haven't found yet..., do you know the
> "Green function"??. Is
> there anything similar in Scipy??, 'cause in Matllab
> there is one but
> i haven't found it in Scipy yet.
> Thanks in advance to everyone ;))
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