Positive scalar curvature on manifolds with odd order abelian fundamental groups

Hanke, Bernhard¹

¹ Institut für Mathematik, Universität Augsburg, Augsburg, Germany

Geometry & topology, Tome 25 (2021) no. 1, pp. 497-546.

Résumé

We introduce Riemannian metrics of positive scalar curvature on manifolds with Baas–Sullivan singularities, prove a corresponding homology invariance principle and discuss admissible products.

Using this theory we construct positive scalar curvature metrics on closed smooth manifolds of dimension at least five which have odd order abelian fundamental groups, are nonspin and atoral. This solves the Gromov–Lawson–Rosenberg conjecture for a new class of manifolds with finite fundamental groups.

Détail

DOI : 10.2140/gt.2021.25.497

Classification : 53C21, 57R15, 55N20, 57T10
Keywords: manifolds with Baas–Sullivan singularities, positive scalar curvature, admissible products, group homology, Brown–Peterson homology

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