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Functional analysis
Theorems in functional analysis
Approximation theory
Banach algebras
Calculus of variations
Convex hulls
F-spaces
Function spaces
Functional analysts
Functional analysis journals
Integral equations
Integral representations
Integral transforms
Linear operators
Metric linear spaces
Metric spaces
Noncommutative geometry
Nonlinear functional analysis
Operator theory
Operator algebras
Optimization in vector spaces
Sequence spaces
Topological vector spaces
Topological tensor products
Topology of function spaces
Variational analysis
Wavelets
Helmut H. Schaefer
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