The Hahn-Banach Theorem
Rajendra Bhatia · Texts and readings in mathematics · 2009
The Hahn-Banach Theorem (H.B.T.) is called one of the three basic principles of linear analysis—the two others are the Uniform Boundedness Principle and the Open Mapping Theorem. We will study them in the next three lectures. The H.B.T. has several versions and several corollaries.