[SciPy-user] General_purpose root-finding routines

[Nils Wagner]

eric jones schrieb:
> 
> I'm all for more solvers/optimizers -- especially a constrained solver
> for nonlinear optimization problems.  The best I know of is cfsqp (Andre
> Tits is the author I believe), but it isn't open source.  If we could
> get one of comparable quality in SciPy, that would be a *huge* addition.
> 
> There are probably a lot of more specialized solvers for specific
> problem types that would also be big additions.
> 
> I don't know of anyone working on such things.
> 
> eric

BTW, I wonder if I can solve the following problem with scipy

P(\lambda(\mu), \mu) x(\mu) = 0
0.5 (x^H x -1) = 0  (Normalization condition)
y^T \frac{\partial P}{\partial \lambda} x = 0

P is a so-called lambda-matrix, for example P = \lambda^2 M + \lambda D
+ K + \mu S
x right-eigenvector
y left-eigenvector
^H : hermitian 
^T : transpose
\mu : real parameter
\lambda : eigenvalue

A small example is appreciated

Thanks in advance

                    Nils

> 
> ----------------------------------------------
> eric jones                    515 Congress Ave
> www.enthought.com             Suite 1614
> 512 536-1057                  Austin, Tx 78701
> 
> > -----Original Message-----
> > From: scipy-user-admin at scipy.net [mailto:scipy-user-admin at scipy.net]
> On
> > Behalf Of Nils Wagner
> > Sent: Wednesday, January 29, 2003 5:52 AM
> > To: scipy-user at scipy.net
> > Subject: [SciPy-user] General_purpose root-finding routines
> >
> > Hi all,
> >
> > Afaik, thers is only one nonlinear m u l t i-variable equation solver
> in
> > scipy so far, that is fsolve.
> > Is there someone thinking about an extension with regard to this field
> ?
> >
> > Nils
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> > SciPy-user at scipy.net
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> 
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