sentence1: recently , banks , fischler , shenker and susskind have proposed a definition of eleven dimensional m theory 1 in the infinite momentum frame as a large n limit of maximally supersymmetric matrix quantum mechanics .
sentence2: banks , fischler , shenker and susskind have proposed that m-theory in the infinite momentum frame is described in terms of a supersymmetric matrix model , the so called mtheory .