Linear operators 7 Operator ideals 3 Operator spaces 3 Banach spaces 2 Boundary value problems 2 Eigenvalues 2 Fredholm equations 2 Laplacian operator 2 Operator theory 2 Summability theory 2 Differential equations 1 Differential equations, Partial -- Asymptotic theory 1 Polynomials 1 Pseudodifferential operators 1 Regression analysis 1