More On Operators On L2 Part 1

Lecture with Ole Christensen. Kapitler: 00:00 - Repetition - L^2(R); 06:30 - Composition Of Opertors; 21:00 - Basis In Hilbert Spaces; 26:30 - Introduction To Orthonormal Bases; 29:30 - Def: Orthonormal System; 31:00 - Def: Orthonormal Basis; 33:15 - The Theorem 4.7.2 ; 43:00 - Proof Of Thrm 4.7.2;