claim: Clueless (film) was followed by a spin-off television sitcom.
evidence: In numerical analysis , Steffensen 's method is a root-finding technique similar to Newton 's method , named after Johan Frederik Steffensen .. numerical analysis. numerical analysis. root-finding technique. root-finding method. Johan Frederik Steffensen. Johan Frederik Steffensen. Steffensen 's method also achieves quadratic convergence , but without using derivatives as Newton 's method does .. quadratic convergence. order of convergence