Some Uniqueness and Growth Theorems in the Cauchy Problem for P utt + M ut + Nu = 0 in Hilbert Space.
Spectral analysis and synthesis
Spectral analysis of non-self-adjoint elliptic operators
Spectral analysis of relativistic atoms -- Dirac operators with singular potentials.
Spectral asymptotics of Laplace operators on surfaces with cusps.
Spectral Geometry and the Kaehler Condition for Complex Manifolds.
Spectral theory and Cauchy problems on Lp spaces.
Spectral Theory of the Dirac Operator.
Spectre conjoint d'opérateurs pseudo-différentiels qui commutent.
Spectre d'ordre supérieur et problèmes aux limites quasi-linéaires
Nello studio dei problemi del tipo , si impongono generalmente delle condizione sul comportamento asintotico di rispetto allo spettro di . Avendo in vista dei problemi quasilineari del tipo , sembra naturale introdurre una nozione di spettro per che tenga conto della dipendenza del membro di destra rispetto al gradiende . L'oggetto di questo lavoro è di definire, studiare e applicare questa nuova nozione di spettro.
Stability of coupled systems.
Stabilizing influence of a Skew-symmetric operator in semilinear parabolic equation
Stark stetige Halbgruppen und Gruppen als Lösungen von Cauchy-Problemen in der Mathematischen Physik.
Stationary Scattering Theory for Time-dependent Hamiltonians.
Stetige Abhängigkeit der Eigenwerte und Eigenfunktionen elliptischer Differentialoperatoren vom Gebiet.
Straight quantum waveguide with Robin boundary conditions.
Structure Properties of Solutions of some Fuchsian Hyperbolic Equations.
Sturm-Liouville systems are Riesz-spectral systems
The class of Sturm-Liouville systems is defined. It appears to be a subclass of Riesz-spectral systems, since it is shown that the negative of a Sturm-Liouville operator is a Riesz-spectral operator on L^2(a,b) and the infinitesimal generator of a C_0-semigroup of bounded linear operators.
Sulla perturbazione delle disequazioni d'evoluzione paraboliche
Sur la notion de trace - application aux problèmes elliptiques