FindMinimum
- To: mathgroup at smc.vnet.net
- Subject: [mg15823] FindMinimum
- From: "Hossein Kazemi" <kazemi at javanet.com>
- Date: Fri, 12 Feb 1999 18:39:44 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
I have an expression that involves the Sign[] function. For example,
consider
f=Sign[4.35x-13.57y +(1-x^2-y^2)]-Sign[2.49x-11.18y+(1-x^2-y^2)]+...
I need to find the minimum of this function. Since the symbolic
derivatives with respect to x and y do not exist, I have to use
FindMinimum[f,{x,{x0,x1}},{y,{y0,y1}}]
But this does not restrict Mathematica not look outside (-1,1) range for
solutions,
where (1 - x^2 - y^2) will not be real.
Is there anyway to find the minimum of a function when symbolic
derivatives of
the function do not exist and values outside a range should not be used.
Thank you.
kazemi at som.umass.edi