Gantmacher–Kreĭn theorem for 2 nonnegative operators in spaces of functions.
Generalizations of Melin's inequality to systems
We discuss a recent necessary and sufficient condition for Melin's inequality for a class of systems of pseudodifferential operators.
Generalized combined field integral equations for the iterative solution of the three-dimensional Helmholtz equation
This paper addresses the derivation of new second-kind Fredholm combined field integral equations for the Krylov iterative solution of tridimensional acoustic scattering problems by a smooth closed surface. These integral equations need the introduction of suitable tangential square-root operators to regularize the formulations. Existence and uniqueness occur for these formulations. They can be interpreted as generalizations of the well-known Brakhage-Werner [A. Brakhage and P. Werner, Arch....
Generalized eigenfunctions of relativistic Schrödinger operators. I.
Geometric proofs of composition theorems for generalized Fourier integral operators.
Gewöhnliche Differentialgleichungen für Erzeugende gewisser Bergman-Operatoren.
Global existence for a semilinear prabolic Volterra equation.
Global solutions of semilinear heat equations in Hilbert spaces.
Grenzordnungen von Operatorenidealen (I).