JournalscmhVol. 81 , No. 3DOI 10.4171/cmh/62

Pointwise taut Riemannian manifolds

  • Michael Leitschkis

    Universität Köln, Germany
Pointwise taut Riemannian manifolds cover

Abstract

In the present work, we investigate pointwise taut Riemannian manifolds by using methods from Riemannian geometry, Morse theory and topology. Using ideas of Terng and Thorbergsson, we extend a result of Warner and show that a compact simply connected pointwise taut nn-dimensional manifold is homeomorphic to a compact rank one symmetric space, if the first conjugate locus of a point is of constant multiplicity. We apply this result to study compact simply connected pointwise taut manifolds in dimensions three and four.