Charles François (systems scientist) Cybernetics Sciences)Honorary President of the Latin American Association of Systemics (ALAS), Honorary Professor of ITBA, Buenos Aires, and was visiting Professor at various universities and educational institutions in Argentina, Perú and Brasil. He became a member of systemic boards and integrated the editorial boards of various journals on Systems and Cybernetics. In 2007 he received from the American Society for Cybernetics, the Norbert Wiener golden medal as a tribute for his work on cybernetics. In 1952 François came in contact with cybernetics through Norbert Wiener's "Cybernetics". In 1958 he joined the Society for General Systems Research now the International Society
Wiener–Hopf method is analytic in the upper half-plane, analytic continuation guarantees existence of an entire function which coincides with the left- or right-hand sides in their respective half-planes. Furthermore, since it can be shown that the functions on either side of the above equation decay at large , an application of Liouville's theorem shows that this entire function is identically zero, therefore and so Wiener–Hopf method The Wiener–Hopf method is a mathematical technique widely used in applied mathematics. It was initially developed by Norbert Wiener and Eberhard Hopf as a method to solve systems of integral equations, but has found wider use