Some characterizations of p-adic semi-Fredholm operators (Q804930)

A semi-Fredholm operator T: \(E\to F\), between two Banach spaces over some complete non-archimedean valued field K, is a continuous linear map such that dim(ker T)\(<\infty\) and im T is closed in F. In Banach spaces there are notions of t-orthogonal subset and compactoid subsets. The paper translates the condition ``semi-Fredholm'' in terms of preservation of t- orthogonality and compactoid subset.