Werner Timmermann

most citedZero product preservers and orthogonality preservers in algebras of unbounded operators

2 citations · 3 across the 3 of their papers we have counts for

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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 $D$ be a dense linear manifold in a Hilbert space $H$ and let $L^{+} (D)$ be the *-algebra of all linear operators $A$ such that $A \mathcal D \subset…