Backtracking line search is an optimization method used to find a step size that sufficiently decreases the objective function during iterative optimization algorithms. This technique involves starting with an initial guess for the step size and then iteratively reducing it until a specified condition, often based on a sufficient decrease criterion, is met. It is especially useful in gradient-based optimization, providing a systematic way to ensure convergence while maintaining computational efficiency.
congrats on reading the definition of Backtracking Line Search. now let's actually learn it.