24 citations · 24 across the 2 of their papers we have counts for
2 papers
math.OA2005★ 24 cited
Some Formulae for Norms of Elementary Operators
Richard M. Timoney
We present a formula for the norm of an elementary operator on a C*-algebra that seems to be new. The formula involves (matrix) numerical ranges and a kind of geometrical mean for…
math.OA2003
Norms and CB norms of Jordan elementary operators
Richard M. Timoney
We establish lower bounds for norms and CB-norms of elementary operators on B(H). Our main result concerns the operator Tx = axb + bxa and we show its norm is at least the product…