17 citations · 101 across the 37 of their papers we have counts for
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Restrictions and extensions of semibounded operators
Palle Jorgensen, Steen Pedersen, Feng Tian
We study restriction and extension theory for semibounded Hermitian operators in the Hardy space of analytic functions on the disk D. Starting with the operator zd/dz, we show that…
Spectral Theory of Multiple Intervals
Palle Jorgensen, Steen Pedersen, Feng Tian
We present a model for spectral theory of families of selfadjoint operators, and their corresponding unitary one-parameter groups (acting in Hilbert space.) The models allow for a…
Translation Representations and Scattering By Two Intervals
Palle Jorgensen, Steen Pedersen, Feng Tian
Studying unitary one-parameter groups in Hilbert space (U(t),H), we show that a model for obstacle scattering can be built, up to unitary equivalence, with the use of translation r…