Displaying similar documents to “Sur les applications linéaires dans un espace de Banach. II”

Les opérateurs semi-Fredholm sur des espaces de Hilbert non séparables

Haïkel Skihri (1999)

Studia Mathematica

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The aim of this paper is to study the α-semi-Fredholm operators in a nonseparable Hilbert space H for all cardinals α with 0 α d i m H . In the first part, we find the relation between γ α ( T ) and c ( π α ( T ) ) for all 0 -regular cardinals α, where γ α is the reduced minimum modulus of weight α, c is the reduced minimum modulus (in a C*-algebra) and π α is the canonical surjection from B(H) onto C α ( H ) = B ( H ) / K α ( H ) . We study the continuity points of the maps c α : T c ( π α ( T ) ) and γ α : T γ α ( T ) . In the second part, we prove some approximation results for semi-Fredholm...

La théorie de Fredholm

Alexander Grothendieck (1956)

Bulletin de la Société Mathématique de France

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