Given a function of one-variable and a possible bracketing interval,
return the minimum of the function isolated to a fractional precision of
tol.
Parameters:
func :callable func(x,*args)
Objective function to minimize.
args :tuple
Additional arguments (if present), passed to func.
brack :tuple
Triple (a,b,c), where (a<b<c) and func(b) <
func(a),func(c). If bracket consists of two numbers (a,
c), then they are assumed to be a starting interval for a
downhill bracket search (see bracket); it doesn’t always
mean that obtained solution will satisfy a<=x<=c.
tol :float
x tolerance stop criterion
full_output :bool
If True, return optional outputs.
Notes:
Uses analog of bisection method to decrease the bracketed
interval.