In unconstrained optimization , we deal with the standard problem of finding the minimum of a function f : rn - r . if we assume that the function is twice continuously differentiable , many methods can be applied to find the minimum 在無約束最優(yōu)化中,考慮尋找f : r ~ n r的極小點。假設f是二次連續(xù)可微的,可以有許多方法尋找它的極小點。