A directed graph Y on p-1 vertices is defined so its Bowen-Franks torsion group matches the minus class group of Q(ζ_p) in order up to p-power and in Galois isotypic components for ℓ not dividing p-1.
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Bowen--Franks groups and minus class groups of cyclotomic number fields with prime conductor
A directed graph Y on p-1 vertices is defined so its Bowen-Franks torsion group matches the minus class group of Q(ζ_p) in order up to p-power and in Galois isotypic components for ℓ not dividing p-1.