Issue No.09 - September (1970 vol.19)
J.D. Bargainer , University of Houston
The problem treated in this paper is that of realizing a Boolean function which is not linearly separable with a network of threshold gates. This problem has been treated by the tree method of Coates and Lewis , the geometric methods of Winder , and the algebraic methods of Hopcroft and Mattson  and Stabler  among others. In the above methods, the techniques become computationally impractical for a large number of variables and functions requiring several threshold gates. The method presented in this paper suffers from the same limitations, as well as from the fact that it is based entirely on necessary but not sufficient conditions for linear separability.
J.D. Bargainer, "R70-34 Unateness Test of a Boolean Function and Two General Synthesis Methods Using Threshold Logic", IEEE Transactions on Computers, vol.19, no. 9, pp. 858, September 1970, doi:10.1109/T-C.1970.223062