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Re: FindRoots?

• To: mathgroup at smc.vnet.net
• Subject: [mg112231] Re: FindRoots?
• From: "David Park" <djmpark at comcast.net>
• Date: Mon, 6 Sep 2010 04:13:32 -0400 (EDT)

I do not find any reference to or instance of FindRoot in the RootSearch
code.


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/  


From: Andrzej Kozlowski [mailto:akozlowski at gmail.com] 

This is, of course, not an argument against having in Mathematica the  sort
of capabilities that Gianluca wrote about. Rather, I don't think the
existing RootSearch actually offers them, since I think it relies on the
built in FindRoot function. Although FindRoot is indeed intended for solving
numerical equations I do not think it can be reliably used with
InterpolatingFunction objects that arise as solutions of differential
equations. I say this on the basis of my own experience. There is often a
way to avoid this by using the "EventLocator" value of the option Method in
NDSolve.


Andrzej Kozlowski