Gerhard Gentzen
Philosopher
German mathematician and philosopher who was remembered for his contributions to proof theory, particularly sequent calculus and natural deduction.
He once studied at the University of Göttingen.
He devised the cut-elimination theorem, which became the cornerstone of proof-theoretic semantics.
He was born in Greifswald, Germany. He was a member of the Nazi Party.
He and Ludwig Wittgenstein pioneered inferential role semantics.