# EmpiricalHessian

#### class EmpiricalHessian[T] extends AnyRef

The empirical hessian evaluates the derivative for multiplcation.

H * d = \lim_e -> 0 (f'(x + e * d) - f'(x))/e

T

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### Instance Constructors

1. #### new EmpiricalHessian(df: DiffFunction[T], x: T, grad: T, eps: Double = 1.0E-5)(implicit vs: VectorSpace[T, Double])

df
x

the point we compute the hessian for

the gradient at x

eps

a small value

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