Weak closure in Hilbert space
116806
Find the weak sequential closure of a set in $L^2(-\pi,\pi)$
152976
Real Analysis: open and closed sets
24050
Characterization of the Closure of a Set
55661
Existence of two disjoint closed sets with zero infimal distance
76234
Is this vector-valued map Hölder-continuous?
127900
Interior of closure of open set in topological space
149407
Weak-to-weak continuous operator which is not norm-continuous
83970
Proof of an elementary property of Projection Operators
19991
Weak convergence, together with convergence of norms, implies strong convergence in a Hilbert space.
55533
Tensor Product: Hilbert Spaces
142782
Operator< and strict weak ordering
144731
Disjoint closed sets in a second countable zero-dimensional space can be separated by a clopen set
95759
Lower Semicontinuity Concepts
15820
Discontinuous linear functional
130045
Show that $l^2$ is a Hilbert space
87940
Question about bilinear form on Hilbert space
74352
A weak version of Markov-Kakutani fixed point theorem