I was saddened to find out that Janos Aczel passed away earlier this month. In my early days, after Boris Paneah got me hooked on functional equations, Aczel’s books caught my eye. Since then I am a fan of his. In particular, I was drawn by a small booklet by him whose title I am not able to reconstruct, and his two larger books “Lectures on Functional Equations and Their Applications” (1966) and “Functional Equations in Several Variables” (1987, co-authored with, Dhombres), which for a couple of years were to me among the most interesting and useful books I knew.
I have two stories two tell about Janos.Read the rest of this entry »