210 citations · 530 across the 38 of their papers we have counts for
40 papers
On the Cotlar-Stein lemma
Michael Hartz, Marcel Scherer
We give a direct proof of the Cotlar-Stein lemma, which does not rely on the power trick.
Inner factors of Dirichlet space functions
Michael Hartz, Stefan Richter
Every function in the Dirichlet space on the unit disc has an inner/outer factorization. We study which inner functions occur in this way. For Blaschke products, this is the well k…
On boundary representations
Kenneth R. Davidson, Michael Hartz
Let be an operator system sitting in its C*-envelope . Starting with a pure state on , let be the face of state extensions to $C^*_{\mathrm{min}}(…
Simply interpolating sequences in complete Pick spaces
Nikolaos Chalmoukis, Alberto Dayan, Michael Hartz
We characterize simply interpolating sequences (also known as onto interpolating sequences) for complete Pick spaces. We show that a sequence is simply interpolating if and only if…
Spectra of Quotient Modules
Michael Didas, Jörg Eschmeier, Michael Hartz +1
We determine the Taylor spectra of quotient tuples of the -shift on Drury-Arveson spaces with finite-dimensional coefficient spaces. We show the the Taylor spectrum can be descr…
Tensor algebras of subproduct systems and noncommutative function theory
Michael Hartz, Orr Shalit
We revisit tensor algebras of subproduct systems with Hilbert space fibers, resolving some open questions in the case of infinite dimensional fibers. We characterize when a tensor…