bundles / scipy 1.17.1 / scipy / optimize / _lbfgsb_py / LbfgsInvHessProduct / _matvec

function

`scipy.optimize._lbfgsb_py:LbfgsInvHessProduct._matvec`

source: /scipy/optimize/_lbfgsb_py.py:552

Signature

def _matvec(self, x)

Summary

Efficient matrix-vector multiply with the BFGS matrices.

Extended Summary

This calculation is described in Section (4) of [1].

Parameters

x : ndarray: An array with shape (n,) or (n,1).

Returns

y : ndarray: The matrix-vector product

Aliases

scipy.optimize.LbfgsInvHessProduct._matvec