Real Analysis : Measure Theory, Integration, and Hilbert Spaces by Rami...

Hilbert Space Methods in Probability and Statistical Inference

Hilbert Space Methods in Probability and Statistical Inference, 1994, E-121

1981 Linear Systems and Operators in Hilbert Space, Fuhrmann, Paul A.

METHODS OF HILBERT SPACES by KRZYSZTOF MAURIN (2nd Rev. Ed.)

Real Analysis: Measure Theory, Integration, and Hilbert Spaces by Rami Shakarchi

Variational Methods in Mathematics, Science and Engineering by Karel Rektorys (E

Integral Methods in Science and Engineering: Analytic Treatment and Numerical Ap