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In functional analysis, the weak operator topology, often abbreviated WOT,[1] is the weakest topology on the set of bounded operators on a Hilbert space , such that the functional sending an operator to the complex number is continuous for any vectors and in the Hilbert space.
Explicitly, for an operator there is base of neighborhoods of the following type: choose a finite number of vectors , continuous functionals , and positive real constants indexed by the same finite set . An operator lies in the neighborhood if and only if for all .
Equivalently, a net of bounded operators converges to in WOT if for all and , the net converges to .
^Ilijas Farah, Combinatorial Set Theory of C*-algebras (2019), p. 80.
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