general/operator-theory

Friedrichs extension (1) De Branges space (1) Naimark's dilation theorem (1) Subfactor (1) Wold's decomposition (1) Unitary operator (1) Sz.-Nagy's dilation theorem (1) Singular value (1) Jacobi operator (1) Nest algebra (1) Reflexive operator algebra (1) Hermitian adjoint (1) Naimark's dilation theorem (1) Subfactor (1) Affiliated operator (1) Schatten norm (1) Dilation (operator theory) (1) Littlewood subordination theorem (1) Approximation property (1) Dilation (operator theory) (1) Dilation (operator theory) (1) Singular integral operators of convolution type (1) Positive-definite function on a group (1) Multiplication operator (1) Positive-definite kernel (1) Affiliated operator (1) Schatten norm (1) Approximation property (1) Positive-definite function on a group (1) Multiplication operator (1) Positive-definite kernel (1) Affiliated operator (1) Schatten norm (1) Calkin algebra (1) Jacobi operator (1) Gelfand–Naimark theorem (1) Crossed product (1) Singular value (1) Friedrichs extension (1) De Branges space (1) Jacobi operator (1) Positive-definite function on a group (1) Multiplication operator (1) Positive-definite kernel (1) Affiliated operator (1) Schatten norm (1) Friedrichs extension (1) De Branges space (1) Hilbert–Schmidt theorem (1) Finite-rank operator (1)