1993
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Christian Ohn et al., « The Dirac operator on compactified Minkowski space », Bulletins de l'Académie Royale de Belgique, ID : 10.3406/barb.1993.27461
We analyze the discrete spectrum of the Dirac operator associated to the two non equivalent spin structures on the compactified Minkowski space S1 x S3, by the usual methods of harmonic analysis. We discuss in detail how the multiplicities of the eigenvalues depend on the radii of S1 and S3, by solving a Diophantine equation.