Journal of the Indian Mathematical Society · 1951 · 68 citations · 0 references
Natural SciencesMathematicsPhysicsAlgebraMathematical PhysicsHilbert Space FormalismLinear AlgebraOperator TheorySpectral AnalysisSpectral TheoryBounded Linear OperatorsBounded OperatorsOperator InequalitiesOperator SpacesUnbounded Operators
A virtually indispensable device for the study of a non-bounded linear operator A in a Hilbert space H consists in passing from the given operator to an associated family of bounded linear operators.