About Alberto Calderón
Alberto Pedro Calderón was an Argentine mathematician. His name is associated with the University of Buenos Aires, but first and foremost with the University of Chicago, where Calderón and his mentor, the analyst Antoni Zygmund, developed the theory of singular integral operators. This created the "Chicago School of (hard) Analysis". This created the "Chicago School of (hard) Analysis" (sometimes simply known as the "Calderón-Zygmund School"). The Calderón-Zygmund decomposition lemma, invented to prove the weak-type continuity of singular integrals of integrable functions, became a standard tool in analysis and probability theory. It led to what is now known as the "Calderón program", with major parts: Calderón's study of the Cauchy integral on Lipschitz curves, and his proof of the boundedness of the "first commutator". It pioneered a new area of mathematical research in inverse problems.
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