Trace Class: Nuclear Operator, Compact (Linear Algebra), Banach Space, Hilbert Space

Toeplitz Algebra: Operator, Operator Algebras, C* algebra, Unilateral Shift, Compact on Hilbert Space

Fredholm Kernel: Mathematics, Banach Space, Nuclear Operator

Self Adjoint: Mathematics, Star Algebra, Involution, Functional Analysis, Linear Operator, Hilbert Space, Adjoint Operator

Von Neumann's Theorem: Mathematics, Operator Theory, Linear Operator, Hilbert Space