45 citations · 156 across the 15 of their papers we have counts for
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Geometric classification of simple graph algebras
Adam P. W. Sørensen
Inspired by Franks' classification of irreducible shifts of finite type we provide a short list of allowed moves on graphs that preserves the stable isomorphism class of the associ…
Amplified graph C*-algebras
Søren Eilers, Efren Ruiz, Adam P. W. Sørensen
We provide a complete invariant for graph C*-algebras which are amplified in the sense that whenever there is an edge between two vertices, there are infinitely many. The invariant…
Almost commuting unitary matrices related to time reversal
Terry A. Loring, Adam P. W. Sørensen
The behavior of fermionic systems depends on the geometry of the system and the symmetry class of the Hamiltonian and observables. Almost commuting matrices arise from band-project…
A characterization of semiprojectivity for commutative C*-algebras
Adam P. W. Sørensen, Hannes Thiel
Given a compact, metric space X, we show that the commutative C*-algebra C(X) is semiprojective if and only if X is an absolute neighborhood retract of dimension at most one. This…