New posts in Hilbert Spaces

Is there a concept of a "free Hilbert space on a set"?

Upper bound for norm of Hilbert space operator

Show that a positive operator on a complex Hilbert space is self-adjoint

Correct spaces for quantum mechanics

Is B(H) a Hilbert space?

about weak convergence in $L^{2}(0,T;H)$

What is a Hilbert space?

Parallelogram law valid in banach spaces?

Is a closed set with the "unique nearest point" property convex?

Brownian Motion Covariance: max instead of min