The Polak-Ribiére method is a variant of the conjugate gradient algorithm used for solving nonlinear optimization problems. It improves upon the standard gradient descent approach by using previous gradients to influence the current search direction, which often leads to faster convergence. This technique is particularly useful in numerical optimization as it combines ideas from both gradient descent and Newton's method.
congrats on reading the definition of Polak-Ribiére. now let's actually learn it.