Compute the Bures-Wasserstein Logarithm — bures_wasserstein

This function computes the Riemannian logarithmic map using the Bures-Wasserstein metric for symmetric positive-definite matrices.

bures_wasserstein_log(sigma, lambda)

Arguments

sigma: A symmetric positive-definite matrix of class dppMatrix, representing the reference point.
lambda: A symmetric positive-definite matrix of class dppMatrix, representing the target point.

A symmetric matrix of class dspMatrix, representing the tangent space image of lambda at sigma.