Faculté des sciences

Non-negative curvature, elliptic genus and unbounded pontryagin numbers

Herrmann, Martin ; Weisskopf, Nicolas

In: Proceedings of the Edinburgh Mathematical Society, 2018, vol. 61, no. 2, p. 449–456

We discuss the cobordism type of spin manifolds with non-negative sectional curvature. We show that in each dimension 4k ⩾ 12, there are infinitely many cobordism types of simply connected and non-negatively curved spin manifolds. Moreover, we raise and analyse a question about possible cobordism obstructions to non-negative curvature. Plus

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    Summary
    We discuss the cobordism type of spin manifolds with non-negative sectional curvature. We show that in each dimension 4k ⩾ 12, there are infinitely many cobordism types of simply connected and non-negatively curved spin manifolds. Moreover, we raise and analyse a question about possible cobordism obstructions to non-negative curvature.