Hybrid Solution of Partial Differential Equations

[3] W. T. Cochran, J. W. Cooley, D. L. Favin, H. D. Holmes, R. A. Kaenel, W. M. Lang, G. C. Maling, D. E. Nelson, C. E. Rader, and P. D. Welch, "What is the fast Fourier transform?" Proc. IEEE, vol. 55, pp. 1664-1674, October 1967. [4] K. W. Henderson, "Some notes on the Walsh functions," IEEE Trans. Electronic Computers (Correspondence), vol. EC-1 3, pp. 50-52, February 1964. [5] R. Lechner, "A transform theory for functions of binary variables," in Theory of Switching, Harvard Computation Lab., Cambridge, Mass., Progress Rept. BL-30, Sec. X, pp. 1-37, November 1961. [6] S. Kaczmarz and H. Steinhaus, Theorie der Orthogonalreihen, 2nd ed. New York: Chelsea, 1951, pp. 125-134. Correction to "Pictorial Output with a Line Printer"'