the wikipedia pg on gradient descent gives the iterative (multivariate/ vector) formula $\mathbf{a}_{n+1} = \mathbf{a}_n - \gamma \nabla \mathbf{F}(\mathbf{a}_n)$ where $\mathbf{a}_n$ moves toward the minimum of $\mathbf{F(x)}$ and $\gamma$ is a step size. my question, when does this reduc...