bfgs

type Constraints struct {
	Value func(x Vector) bool
}

type Epsilon struct {
	Value float64
}

type Hessian struct {
	Value Matrix
}

type Hook struct {
	Value func(x, gradient ConstVector, y ConstScalar) bool
}

type MaxIterations struct {
	Value int
}

type Objective func(ConstVector) (MagicScalar, error)

type ObjectiveInSitu struct {
	Eval func(x, g Vector, y Scalar) error
	X    MagicVector
}