Positive -intermediate Ricci curvature on a Riemannian -manifold, to be denoted by , is a condition that interpolates between positive sectional and positive Ricci curvature (when $k =1k=n-1$ respectively). In this work, we produce many examples of manifolds of with small by examining symmetric and normal homogeneous spaces, along with certain metric deformations of fat homogeneous bundles. As a consequence, we show that every dimension congruent to supports infinitely many closed simply connected manifolds of pairwise distinct homotopy type, all of which admit homogeneous metrics of for some . We also prove that each dimension congruent to or supports closed manifolds which carry metrics of with , but do not admit metrics of positive sectional curvature.

生成讲解博客的中文版本

生成AI智能校验的中文版本