Kurt GÃ del ( April 28 , 1906 Brno , then Austria-Hungary , now Czech Republic -- January 14 , 1978 Princeton , New Jersey ) was a logician , mathematician , and philosopher of mathematics . Kurt Friedrich GÃ del ( ; April 28 , 1906 , Brno , Moravia , Austriaâ `` Hungary â `` January 14 , 1978 , Princeton , New Jersey , United States ) was an Austrian logician , mathematician and philosopher .