Chaim Samuel Hönig (1 February 1926 – 19 March 2018) was a Brazilian mathematician. He was the main proposer of the Brazilian Mathematical Colloquium (1957), one of the founders of the Brazilian Mathematical Society (SBM), and its first president. Hönig was a full professor at the Institute of Mathematics and Statistics of the University of São Paulo and a member of the Brazilian Academy of Sciences. Hönig made relevant contributions to functional analysis."Primeiro Colóquio Brasileiro de Matemática: uma breve apresentação da participação feminina", Angelica Raiz Calabria e Mariana Feiteiro Cavalari, 2004.
Books , Volumes 1–2, Instituto de Matemática e Estatística, University of São Paulo, 1970 Volterra–Stieltjes integral Equations: Functional Analytic Methods, Linear Constraints (Mathematics Studies), Elsevier, 1975
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