2 citations · 3 across the 3 of their papers we have counts for
3 papers
math.OA2005
Jordan maps and triple maps on algebras of unbounded operators
Werner Timmermann
The paper contains results on the structure of Jordan maps and several kinds of triple maps on standard algebras of unbounded operators in Hilbert spaces. These results are unbound…
math.OA2005★ 2 cited
Zero product preservers and orthogonality preservers in algebras of unbounded operators
Werner Timmermann
Applying a result of abstract ring theory we get that bijective additive mappings on standard algebras of unbounded operators preserving zero products are multiples of ring isomorp…
math.OA2004★ 1 cited
Additive mappings in algebras of unbounded operators preserving operators of rank one
W. Timmermann
Let be a dense linear manifold in a Hilbert space and let be the *-algebra of all linear operators such that $A \mathcal D \subset…