- 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