N. I. Akhiezer, "Theory of Linear Operators in Hilbert Space "
English | ISBN: 0486677486 | | 400 pages | PDF | 11 MB
English | ISBN: 0486677486 | | 400 pages | PDF | 11 MB
This classic textbook introduces linear operators in Hilbert Space, and presents the geometry of Hilbert space and the spectral theory of unitary and self-adjoint operators. Invaluable for every mathematician and physicist. 1961, 1963 edition.