Where to find the image of a derivation

Volume 30 / 1994

Martin Mathieu Banach Center Publications 30 (1994), 237-249 DOI: 10.4064/-30-1-237-249


With this paper, we intend to provide an overview of some recent work on a problem on unbounded derivations of Banach algebras that still defies solution, the non-commutative Singer-Wermer conjecture. In particular, we discuss several global as well as local properties of derivations entailing quasinilpotency in the image.


  • Martin Mathieu

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