Maeva Ostermann

collaborators

2 papers

math.FA2022

On the image of the mean transform

Fadil Chabbabi, Maëva Ostermann

Let $B (H)$ be the algebra of all bounded operators on a Hilbert space $H$ . Let $T = V ∣ T ∣$ be the polar decomposition of an operator $T \in B (H)$ . The mean transform of $T$ is defined…

math.FA2022

The Aluthge and the mean transforms of $m$ -isometries

Fadil Chabbabi, Maëva Ostermann

Let $T \in B (H)$ be a bounded linear operator on a Hilbert space $H$ , let $T = V ∣ T ∣$ be its polar decomposition of $T$ and let $λ \in [0, 1]$ . The $λ$ -Aluthge transform $Δ_{λ} (T)$ and t…

On the image of the mean transform

The Aluthge and the mean transforms of m-isometries

The Aluthge and the mean transforms of $m$ -isometries