Tracking control of a flexible beam by nonlinear boundary feedback.
Transfer matrices and transport for Schrödinger operators
We provide a general lower bound on the dynamics of one dimensional Schrödinger operators in terms of transfer matrices. In particular it yields a non trivial lower bound on the transport exponents as soon as the norm of transfer matrices does not grow faster than polynomially on a set of energies of full Lebesgue measure, and regardless of the nature of the spectrum. Applications to Hamiltonians with a) sparse, b) quasi-periodic, c) random decaying potential are provided....
Transfer positive hemicontinuity and zeros, coincidences, and fixed points of maps in topological vector spaces.
Transference for hypergroups.
A transference theorem for convolution operators is proved for certain families of one-dimensional hypergroups.
Transferring monotonicity in weighted norm inequalities.
Certain weighted norm inequalities for integral operators with non-negative, monotone kernels are shown to remain valid when the weight is replaced by a monotone majorant or minorant of the original weight. A similar result holds for operators with quasi-concave kernels. To prove these results a careful investigation of the functional properties of the monotone envelopes of a non-negative function is carried-out. Applications are made to function space embeddings of the cones of monotone functions...
Transfinite methods in metric fixed-point theory.
Transformaciones entre espacios de funciones continuas casi convergentes.
Transformation de Poisson sur un arbre localement fini
Dans cet article on étudie en premier lieu la résolvante (le noyau de Green) d’un opérateur agissant sur un arbre localement fini. Ce noyau est supposé invariant par un groupe d’automorphismes de l’arbre. On donne l’expression générique de cette résolvante et on établit des simplifications sous différentes hypothèses sur .En second lieu on introduit la transformation de Poisson qui associe à une mesure additive finie sur l’espace des bouts de l’arbre une fonction propre de l’ opérateur. On...
Transformation operators for the perturbed Hill difference equation and one of their applications.
Transformation semigroups and L1-approximation for size structured population models.
Transformations de Riesz pour les lois gaussiennes
Transformationseigenschaften endlicher Ketten und allgemeine Verzweigungsaussagen.
Transforms for Operators and Symplectic Automorphisms over a Locally Compact Abelian Group.
Transient behavior of powers and exponentials of large Toeplitz matrices.
Transition operator characterizations of compact and maximally almost periodic locally compact groups.
Transition operators on co-compact G-spaces.
We develop methods for studying transition operators on metric spaces that are invariant under a co-compact group which acts properly. A basic requirement is a decomposition of such operators with respect to the group orbits. We then introduce reduced transition operators on the compact factor space whose norms and spectral radii are upper bounds for the Lp-norms and spectral radii of the original operator. If the group is amenable then the spectral radii of the original and reduced operators coincide,...
Transition semigroups for stochastic semilinear equations on Hilbert spaces [Book]
Transitions d’Anderson pour des opérateurs de Schrödinger quasi-périodiques en dimension 1
Transitivity for linear operators on a Banach space
Let G be the multiplicative group of invertible elements of E(X), the algebra of all bounded linear operators on a Banach space X. In 1945 Mackey showed that if and are any two sets of linearly independent elements of X with the same number of items, then there exists T ∈ G so that , . We prove that some proper multiplicative subgroups of G have this property.
Transizioni di fase ed isteresi
L'attività di ricerca di chi scrive si è finora indirizzata principalmente verso l'esame dei modelli di transizione di fase, dei modelli di isteresi, e delle relative equazioni non lineari alle derivate parziali. Qui si illustrano brevemente tali problematiche, indicando alcuni degli elementi che le collegano tra di loro. Il lavoro è organizzato come segue. I paragrafi 1, 2, 3 vertono sulle transizioni di fase: si introducono le formulazioni forte e debole del classico modello di Stefan, e si illustrano...