On strictly singular operators
D. Van Dulst (1971)
Compositio Mathematica
Similarity:
D. Van Dulst (1971)
Compositio Mathematica
Similarity:
Cross, R.W. (1990)
Portugaliae mathematica
Similarity:
R. W. Cross (1994)
Publicacions Matemàtiques
Similarity:
A linear operator T: D(T) ⊂ X → Y, when X and Y are normed spaces, is called (UO) if every infinite dimensional subspace M of D(T) contains another such subspace N for which T|N is open (in the relative sense). The following properties are shown to be equivalent: (i) T is UO, (ii) T is ubiquitously almost open, (iii) no infinite dimensional restriction of T is injective and precompact, (iv) either T is upper semi-Fredholm or T has finite dimensional range, (v) for each infinite dimensional...
Lutz Weis (1976)
Studia Mathematica
Similarity:
D. Van Dulst (1972)
Compositio Mathematica
Similarity:
Józef Burzyk, Andrzej Kamiński (1999)
Mathematica Slovaca
Similarity:
Steven Bellenot (1978)
Studia Mathematica
Similarity:
Paweł Domański, Lech Drewnowski (1990)
Studia Mathematica
Similarity: