# Package org.encog.mathutil.matrices.hessian

- Interface Summary
  Interface | Description
  --- | ---
  ComputeHessian | Compute (estimate) the Hessian matrix.

- Class Summary
  Class | Description
  --- | ---
  BasicHessian | Some basic code used to calculate Hessian matrixes.
  ChainRuleWorker | A threaded worker that is used to calculate the first derivatives of the output of the neural network.
  HessianCR | Calculate the Hessian matrix using the chain rule method.
  HessianFD | Calculate the Hessian matrix using the finite difference method.

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