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NSolve using crushes mathematica 7

  • To: mathgroup at smc.vnet.net
  • Subject: [mg112522] NSolve using crushes mathematica 7
  • From: Piotr Melenev <aq.velo at gmail.com>
  • Date: Sat, 18 Sep 2010 07:26:36 -0400 (EDT)

Hello,

I use NSolve function to find the roots of the trigonometric equation
inside following function:

getroots[ p_ , q_ , h_ ] := Module[ {res},
         res = NSolve[ Sin[2*t] - 2*h*(Cos[p]*Cos[t]*Sin[q] -
Sin[t]*Cos[q]) == 0, t];
         t /. res
]

When I evaluate this function separately - it works properly. But if I
embed it into another Mathematica function, like NIntegrate, Plot etc
(which automatically choses values of the variables) relative to p
variable, Mathematica kernel is crushed with APPCRUSH winerror. At the
same time I can calculate appropriate table of values and use it in
ListPlot or in "hand-made" numerical integration function. But it is
tiresomely and besides that I want to understand what is the cause of
the error...

Thank everybody in advance!


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