4 papers
math.OA2026
On amplified graph C*-algebras as cores of Cuntz-Krieger algebras
Francesco D'Andrea, Sophie Emma Zegers
Given a finite directed acyclic graph , we construct from it two graphs and , one by adding a loop at every vertex of and one by replacing every arrow of by c…
math.KT2025
On the K-theory of the AF core of a graph C*-algebra
Francesco D'Andrea
In this paper, we study multiplicative structures on the K-theory of the core of the C*-algebra of a directed graph . In the first part of the paper,…
math.QA2025
Isomorphisms of quantum spheres
Francesco D'Andrea
For and , the Vaksman-Soibelman quantum sphere is described by an associative algebra deforming the algebra of p…
math.QA2025
On characteristic classes of vector bundles over quantum spheres
Francesco D'Andrea, Giovanni Landi, Chiara Pagani
We study the quantization of spaces whose K-theory in the classical limit is the ring of dual numbers . For a compact Hausdorff space we recall necessary and s…