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 series by Norbert Wiener used in signal processing. Given a system with an input/output pair formula_1 where the input is white noise with zero mean value and power A, we can write the output of the system as sum of a series of Wiener G-functionals formula_2 In the following the expressions of the G-functionals up to the fifth order will be given: formula_3 formula_4 formula_5 formula_6 formula_7 formula_8 formula_9 formula_10 formula_11 Wiener series In mathematics, the Wiener series (or "Wiener G-functional expansion") originates from the 1958 book of Norbert Wiener. It is an orthogonal expansion for nonlinear functionals closely related to