Yao used the minimax theorem to prove what is now known as Yao 's Principle .
He is currently a Professor and the Dean of Institute for Interdisciplinary Information Sciences ( IIIS ) at Tsinghua University .
Professor used the minimax theorem to prove what is now known as Yao 's Principle .
He is currently a Professor and the Dean of Institute for Interdisciplinary Information Sciences ( IIIS ) at Tsinghua University .