Re: function minimization

[Ismael Núñez-Riboni]

Two fast solutions:

1) plot(y,f)

And then make click with the middle button of the mouse over the minimum 
to get its values on the plot...

2) y( y == min(y))

but this is perhaps not as exact as you might want (not implicit 
interpolation)...

otherwise try

help roots

or finaly: there are a couple of minimization functions, but you don't 
need them because you have a polynomial, this should not be a big 
problem, roots should make the job...