This function returns the Chebyshev center and Chebyshev radius of a polytope defined by linear inequalities Ax<=b. The Chebyshev center of a polytope is the center of the largest hypersphere enclosed by the polytope. Similarly the Chebyshev radius is the radius of the largest hypersphere enclosed by the polytope.
Allow third argument specifying an indifference threshold for the radius. It will not bother looking for a point deeper in the interior than this.