摘要Two theorems are proved. They are with principal significance in functional analysis, for they imply some well known theorems, such as the open mapping theorem, the closed graph theorem and the Banach Steinhaus theorem.
1Fang Jinqing Fang Qing~② China Institule of Atomic Energy,P.O.Box 275-27,Beijing 102413 Beijing Institute of Television Research,Beijing 100031.Synchronizing Hyperchaos by Drive-Feedback Control[J].Chinese journal of nuclear physics,1996(4):244-245.
