# September 1963 - Vol. 6 No. 9

## Features

A semi-iterative process for evaluating arctangents

The technique of obtaining arctangents by inverse interpolation [1] is a relatively long process not suitable for a subroutine. The Taylor series expansion for arguments…

MIRFAC: a compiler based on standard mathematical notation and plain English

A pilot version of the compiler MIRFAC, now in the operation, is described. The chief features of the system, which is intended for the solution of scientific problems,…

On the approximate solution of Δ u=F(u)

Three-dimensional Dirichlet problems for &Dgr;u = F(u), Fu ≧ 0, are treated numerically by an exceptionally fast, exceptionally accurate numerical method. Programming…

A general program for the analysis of square and rectanglar lattice designs

This paper describes a general-purpose program that will handle those incomplete block designs known as square and rectangular lattices. Flow diagrams are given so that…

Group participation computer demonstration

Engelbart1 has reported on some demonstrations in which a group functions as various parts of a digital computer. These demonstrations are concerned with binary…