# April 1966 - Vol. 9 No. 4

## Features

Information dissemination and publication control

The present issue contains a “Forum on Algorithms” dealing with some of the problems which arise in connection with the algorithm policy of the…

A simple user-oriented compiler source language for programming automatic test equipment

For the nonprogrammer, difficulty in using a language increases rapidly with the number of nonproblem-oriented conventions. A simple language, even if inelegant, which…

A nonrecursive method of syntax specification

The use of the Kleene regular expression notation for describing algebraic language syntax, in particular of ALGOL, is described in this paper. A FORTRAN II computer…

Algorithm 279: Chebyshev quadrature

It has always been obvious that the aid to calculation offered by the computer forces a change in the curricula of mathematics, statistics, physics, engineering and other…

A method for finding the least squares estimate of the intersection point of two Helices in space

When the helical trajectories of two charged particles moving away from a common point in a magnetic field are reconstructed from measurements on the tracks, the…

Methods of numerical integration applied to a system having trivial function evaluations

A study has been made to determine which methods of numerical integration require the least computation time for a given amount of truncation error when applied to a…

Starting approximations for square root calculation on IBM system /360

Several starting approximations for square root calculation by Newton's method are presented in a form to facilitate their use in IBM System/360 square root routines.…

Mechanization of the curve fitting process: DATAN

A process for fitting a curve to approximate data and the problem it creates for the engineer-programmer is defined. An approach has also been defined and a system has…

A method for locating zeros of complex functions

A method for computing the index, or winding number, is developed and applied to the problem of finding zeros of functions from the plane into the plane.