This is a scalar (s) in an algorithm of the form: x' = x + sd, where d is the direction vector. After d is chosen (nonzero), the step size is specified. One step size selection rule is line search; another is a fixed sequence, like s_k = 1/k. Found on http://glossary.computing.society.informs.org/index.php?page=S.html
This is a scalar (s) in an algorithm of the form: x' = x + sd, where d is the direction vector. After d is chosen (nonzero), the step size is specified. One step size selection rule is line search; another is a fixed sequence, like s_k = 1/k.