17 citations · 58 across the 15 of their papers we have counts for
Showing 2017Show all
2 papers · 1 filter
math.FA2017★ 5 cited
Holomorphic families of forms, operators and -semigroups
Hendrik Vogt, Jürgen Voigt
If is a holomorphic function with values in the sectorial forms in a Hilbert space, then the associated operator valued function is resolvent holomorp…
math.SP2017
Numerical Range and Quadratic Numerical Range for Damped Systems
Birgit Jacob, Christiane Tretter, Carsten Trunk +1
We prove new enclosures for the spectrum of non-selfadjoint operator matrices associated with second order linear differential equations $\ddot{z}(t) + D \dot{z} (t) + A_0 z(t) = 0…