Homological aspects of the theory of Banach complexes
The authors clarify how the assumption of normal solvability of one of the differentials of Banach complexes \(A\), \(B\), and \(C\) constituting a short exact sequence \(0\to A\to B\to C\to 0\) affects the properties of other differentials of these complexes and the exactness property of the sequence of the reduced homology spaces.
normal and compact solvability of a linear operator
scientific article; zbMATH DE number 1396707