104 citations · 141 across the 40 of their papers we have counts for
5 papers · 1 filter
Nearly invariant subspaces for shift semigroups
Yuxia Liang, Jonathan R. Partington
Let be a -semigroup on an infinite dimensional separable Hilbert space; a suitable definition of near invariance of a subspace is pre…
Dual-band general Toeplitz operators
M. Cristina Câmara, Ryan O'Loughlin, Jonathan R. Partington
We relate dual-band general Toeplitz operators to block truncated Toeplitz operators and, via equivalence after extension, with Toeplitz operators with matrix symbols.…
Weighted operator-valued function spaces applied to the stability of delay systems
A. E. Alajyan, J. R. Partington
This paper extends the theory of Zen spaces (weighted Hardy/Berg\-man spaces on the right-hand half-plane) to the Hilbert-space valued case, and describes the multipliers on them;…
and BIBO stability of systems with variable delays
Catherine Bonnet, Jonathan R. Partington
This paper considers and BIBO stability and stabilization issues for systems with time-varying delays which can be of retarded or neutral type. An important role is played by…
Nearly invariant subspaces for operators in Hilbert spaces
Yuxia Liang, Jonathan R. Partington
For a shift operator with finite multiplicity acting on a separable infinite dimensional Hilbert space we represent its nearly invariant subspaces in terms of invarian…