Odd-dimensional orbifolds with all geodesics closed are covered by manifolds

Amann, Manuel; Lange, Christian and Radeschi, Marco (2021): Odd-dimensional orbifolds with all geodesics closed are covered by manifolds. In: Mathematische Annalen, Vol. 380, No. 3-4: pp. 1355-1386

Abstract

Manifolds all of whose geodesics are closed have been studied a lot, but there are only few examples known. The situation is different if one allows in addition for orbifold singularities. We show, nevertheless, that the abundance of new examples is restricted to even dimensions. As one key ingredient we provide a characterization of orientable manifolds among orientable orbifolds in terms of characteristic classes.

• Item Type: Journal article
• Faculties: Mathematics, Computer Science and Statistics > Mathematics
• Subjects: 500 Science > 510 Mathematics
• ISSN: 0025-5831
• Language: English