Relative boundedness and compactness theory for second-order differential operators.
Relative boundedness conditions and the perturbation of nonlinear operators
Relative Inverses of Meromorphic Operator Functions and Associated Holomorphic Projection Function.
Relative Inversion in der Störungstheorie von Operatoren und ...-Algebren.
Relative regularity and Riesz operators
Relatively bounded and compact perturbations of th order differential operators.
Relatively open operators and the ubiquitous concept.
A linear operator T: D(T) ⊂ X → Y, when X and Y are normed spaces, is called ubiquitously open (UO) if every infinite dimensional subspace M of D(T) contains another such subspace N for which T|N is open (in the relative sense). The following properties are shown to be equivalent: (i) T is UO, (ii) T is ubiquitously almost open, (iii) no infinite dimensional restriction of T is injective and precompact, (iv) either T is upper semi-Fredholm or T has finite dimensional range, (v) for each infinite...
Relatively tauberian resolvent operators.
Remark on an operator inequality
Remark on linear equations in Banach space
Remark on sums of complemented subspaces
Remarks on embeddable semigroups in groups and a generalization of some Cuthbert's results.
Remarks on extreme eigenvalues of Toeplitz matrices.
Remarks on Kato's square-root problem.
Remarks on locally q-contraction operators
Remarks on quadratic equations in Banach space.
Remarks on relativistic Schrödinger operators and their extensions
Remarks on restriction eigenfunctions in .
Remarks on separation of convex sets, fixed-point theorem, and applications in theory of linear operators.
Remarks on Set-Contractions and Condensing Maps.