On the classification and description of quantum lens spaces as graph algebras

TL;DR

This paper redefines quantum lens spaces as graph C*-algebras, correcting previous errors and introducing a new number-theoretic invariant for low-dimensional cases, enhancing understanding of their algebraic structure.

Contribution

It provides a corrected description of quantum lens spaces as graph C*-algebras and introduces a novel invariant for certain cases, building on prior research.

Findings

Corrected the description of quantum lens spaces as graph C*-algebras.

Introduced a new number-theoretic invariant for n ≤ 3 cases.

Extended previous work on algebraic invariants of quantum spaces.

Abstract

We investigate quantum lens spaces, $C(L_q^{2n+1}(r;\underline{m}))$, introduced by Brzezi\'nski-Szyma\'nski as graph $C^*$-algebras. We give a new description of $C(L_q^{2n+1}(r;\underline{m}))$ as graph $C^*$-algebras amending an error in the original paper by Brzezi\'nski-Szyma\'nski. Furthermore, for $n\leq 3$, we give a number-theoretic invariant, when all but one weight are coprime to the order of the acting group $r$. This builds upon the work of Eilers, Restorff, Ruiz and S{\o}rensen.