Lev Pontryagin

I knew about a Russian mathematician, Lev Pontryagin, in my control theory class. He lost his eyesight at age of 14 due to a stove explosion. His mother had a great contribution to his success in math by reading math books and papers! I am amazed how all the concepts and notations and formulas were forming in his mind. Later in his career, he developed optimal control theory.

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