scipy.optimize.LbfgsInvHessProduct.matvec

LbfgsInvHessProduct.matvec(self, x)

Matrix-vector multiplication.

Performs the operation y=A*x where A is an MxN linear operator and x is a column vector or 1-d array.

Parameters

x{matrix, ndarray}

An array with shape (N,) or (N,1).

Returns

y{matrix, ndarray}

A matrix or ndarray with shape (M,) or (M,1) depending on the type and shape of the x argument.

Notes

This matvec wraps the user-specified matvec routine or overridden _matvec method to ensure that y has the correct shape and type.