Horizontally homothetic submersions and nonnegative curvature Ye-Lin OuFrederick Wilhelm 53C2053C21horizontally homothetic submersionsRiemannian submersionsnonnegative curvature We show that any horizontally homothetic submersion from a compact manifold of nonnegative sectional curvature is a Riemannian submersion. Indiana University Mathematics Journal 2007 text pdf 10.1512/iumj.2007.56.2999 10.1512/iumj.2007.56.2999 en Indiana Univ. Math. J. 56 (2007) 243 - 262 state-of-the-art mathematics http://iumj.org/access/