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"extrema" and complex stationary points in Maple
Posted:
Dec 6, 1996 10:11 AM


"extrema" is a useful procedure in Maple that can optimize nonlinear functions subject to nonlinear equalities. However, it sometimes goes overboard and considers even the complex stationary points, if they exist.
For example, to minimize x^4+2*x^2, we enter
> extrema(x^4+2*x^2,{},{x},s);
{0, 1} > s; {{x = I}, {x = 0}, {x = I}}
For this simple problem Maple gives three stationary solutions two of which are complex. Is it possible to tell Maple that it should only consider the _real stationary points_ as the complex ones have no meaning in some problems?
Mahmut Parlar



