The steepest descent algorithm.

Method of steepest descent - Wikipedia

matrices - How is the preconditioned conjugate gradient algorithm related to the steepest descent method? - Mathematics Stack Exchange

Gradient Descent Algorithm in Machine Learning - Analytics Vidhya

Guide to gradient descent algorithms

Conjugate gradient methods - Cornell University Computational Optimization Open Textbook - Optimization Wiki

Lecture 7: Gradient Descent (and Beyond)

example of steepest Descent (left) and Conjugate Gradient (right)

Steepest Descent Rate

Steepest descent method in sc

Steepest Descent - an overview