1278	 Wengert s Numerical Method for Partial Derivatives Orbit Determination and Quasilinearization	 In a recent article in the Communications of the ACM R. Wengert suggested a technique for machine evaluation of the partial derivatives of a function given in analytical form. In solving non-linear boundary-value problems using quasilinearization many partial derivatives must be formed analytically and then evaluated numerically. Wengert s method appears very attractive from the programming viewpoint equations which might not otherwise be undertaken.
