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On Arens-Michael algebras which do not have non-zero injective ⨶-modules

A. Pirkovskii (1999)

Studia Mathematica

A certain class of Arens-Michael algebras having no non-zero injective topological ⨶-modules is introduced. This class is rather wide and contains, in particular, algebras of holomorphic functions on polydomains in n , algebras of smooth functions on domains in n , algebras of formal power series, and, more generally, any nuclear Fréchet-Arens-Michael algebra which has a free bimodule Koszul resolution.

On Cental Morphisms

Athanassios Kyriazis (1992)

Δελτίο της Ελληνικής Μαθηματικής Εταιρίας

On (Co)homology of triangular Banach algebras

Mohammad Sal Moslehian (2005)

Banach Center Publications

Suppose that A and B are unital Banach algebras with units 1 A and 1 B , respectively, M is a unital Banach A,B-module, = A M 0 B is the triangular Banach algebra, X is a unital -bimodule, X A A = 1 A X 1 A , X B B = 1 B X 1 B , X A B = 1 A X 1 B and X B A = 1 B X 1 A . Applying two nice long exact sequences related to A, B, , X, X A A , X B B , X A B and X B A we establish some results on (co)homology of triangular Banach algebras.

On complex interpolation and spectral continuity

Karen Saxe (1998)

Studia Mathematica

Let [ X 0 , X 1 ] t , 0 ≤ t ≤ 1, be Banach spaces obtained via complex interpolation. With suitable hypotheses, linear operators T that act boundedly on both X 0 and X 1 will act boundedly on each [ X 0 , X 1 ] t . Let T t denote such an operator when considered on [ X 0 , X 1 ] t , and σ ( T t ) denote its spectrum. We are motivated by the question of whether or not the map t σ ( T t ) is continuous on (0,1); this question remains open. In this paper, we study continuity of two related maps: t ( σ ( T t ) ) (polynomially convex hull) and t e ( σ ( T t ) ) (boundary of the polynomially convex...

On duals of Calderón-Lozanovskiĭ intermediate spaces

Yves Raynaud (1997)

Studia Mathematica

We give a description of the dual of a Calderón-Lozanovskiĭ intermediate space φ(X,Y) of a couple of Banach Köthe function spaces as an intermediate space ψ(X*,Y*) of the duals, associated with a "variable" function ψ.

On equivalence of K- and J-methods for (n+1)-tuples of Banach spaces

Irina Asekritova, Natan Krugljak (1997)

Studia Mathematica

It is shown that the main results of the theory of real interpolation, i.e. the equivalence and reiteration theorems, can be extended from couples to a class of (n+1)-tuples of Banach spaces, which includes (n+1)-tuples of Banach function lattices, Sobolev and Besov spaces. As an application of our results, it is shown that Lions' problem on interpolation of subspaces and Semenov's problem on interpolation of subcouples have positive solutions when all spaces are Banach function lattices or their...

On extrapolation spaces

Giuseppe Da Prato, Pierre Grisvard (1982)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

Si definisce un nuovo tipo di spazi a partire da un dato spazio di Banach X e da un operatore lineare A in X . Tali spazi si possono pensare come spazi di interpolazione D A ( ϑ ) con ϑ negativo.

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