Box-Search Algorithm in Chapter 2 (Matlab codes)

<div>We use this method to solve Example 2.36 in Chapter 2. There are two files:</div><div><br></div><div>grid3 is a function to define f=x^2+y^2+z^2.<div>boxs3 is a grid-search function to prove the bound of grid3.</div><div><br></div></div>