On the relationship between difference and projection-difference methods
On the Relationship Between yp-Radonifying Operators and Other Operator Ideals in Banach Spaces of Stable Type p.
On the Relative Completeness of the Generalized Eigenvectors of Elliptic Eigenvalue Problems with Indefinite Weight Functions.
On the representation of norm attaining positive operators on
On the right inverse operators which are defined by Eidelheit sequences.
On the r-Nuclearity of Gaussian Covariances and the Composition of Nuclear Operators.
On the Rockafellar theorem for -monotone multifunctions
Let X be an arbitrary set, and γ: X × X → ℝ any function. Let Φ be a family of real-valued functions defined on X. Let be a cyclic -monotone multifunction with non-empty values. It is shown that the following generalization of the Rockafellar theorem holds. There is a function f: X → ℝ such that Γ is contained in the -subdifferential of f, .
On the role of the normalization factors and of the pseudo-metric in crypto-Hermitian quantum models.
On the S4-norm of a Hankel form.
On the scattering matrix for perturbations of constant sign
On the scattering theory for quantum dynamical semigroups
On the Schauder fixed point theorem
The paper contains a survey of various results concerning the Schauder Fixed Point Theorem for metric spaces both in single-valued and multi-valued cases. A number of open problems is formulated.
On the Schrödinger equation in L...spaces.
On the Schrödinger heat kernel in horn-shaped domains
We prove pointwise lower bounds for the heat kernel of Schrödinger semigroups on Euclidean domains under Dirichlet boundary conditions. The bounds take into account non-Gaussian corrections for the kernel due to the geometry of the domain. The results are applied to prove a general lower bound for the Schrödinger heat kernel in horn-shaped domains without assuming intrinsic ultracontractivity for the free heat semigroup.
On the second eigenvalue of a Hardy-Sobolev operator.
On the second order slip Reynolds equation with molecular dynamics: existence and uniqueness.
On the second quantisation of Hilbert-Schmidt processes
On the semi-Browder spectrum
An operator in a Banach space is called upper (lower) semi-Browder if it is upper (lower) semi-Fredholm and has a finite ascent (descent). We extend this notion to n-tuples of commuting operators and show that this notion defines a joint spectrum. Further we study relations between semi-Browder and (essentially) semiregular operators.
On the semigroup of mappings on Fréchet Montel space
On the Semigroup of the Stokes Operator for Exterior Domains in Lq-Spaces.