Compact attractors for time-periodic age-structured population models.
Compact composition operators and Carleson measure in the upper half-plane.
Compact composition operators on Hardy-orlicz spaces
Compact Composition Operators on Lorentz Spaces
Compact convolution operators between -spaces
Compact diagonal linear operators on Banach spaces with unconditional bases.
Compact differences of composition operators on weighted Dirichlet spaces
Here we consider when the difference of two composition operators is compact on the weighted Dirichlet spaces . Specifically we study differences of composition operators on the Dirichlet space and S 2, the space of analytic functions whose first derivative is in H 2, and then use Calderón’s complex interpolation to extend the results to the general weighted Dirichlet spaces. As a corollary we consider composition operators induced by linear fractional self-maps of the disk.
Compact embedding theorems for generalized Sobolev spaces
In this Note we give some compact embedding theorems for Sobolev spaces, related to -tuples of vectors fields of class on .
Compact Embeddings for Weighted Orlicz-Sobolev Spaces on IRN.
Compact embeddings of Brézis-Wainger type.
Let Ω be a bounded domain in Rn and denote by idΩ the restriction operator from the Besov space Bpq1+n/p(Rn) into the generalized Lipschitz space Lip(1,-α)(Ω). We study the sequence of entropy numbers of this operator and prove that, up to logarithmic factors, it behaves asymptotically like ek(idΩ) ~ k-1/p if α > max (1 + 2/p + 1/q, 1/p). Our estimates improve previous results by Edmunds and Haroske.
Compact endomorphisms of
Compact composition operators on , where G is a region in the complex plane, and the spectra of these operators were described by D. Swanton ( Compact composition operators on B(D), Proc. Amer. Math. Soc. 56 (1976), 152-156). In this short note we characterize all compact endomorphisms, not necessarily those induced by composition operators, on , where D is the unit disc, and determine their spectra.
Compact failure of multiplicativity for linear maps between Banach algebras.
Compact Hermitian operators on projective tensor products of Banach algebras.
Compact imbeddings in weighted Sobolev spaces and nonlinear boundary value problems
Compact Integral Operators on Banach Function Spaces.
Compact Jacobi matrices : from Stieltjes to Krein and
Compact non-nuclear operator problem
Compact, non-nuclear operators
Compact operators and approximation spaces
We investigate compact operators between approximation spaces, paying special attention to the limit case. Applications are given to embeddings between Besov spaces.
Compact operators defined on 2-normed and 2-probabilistic normed spaces.