2011/05/23 by Emily Proctor · 3 citations
Mathematics · #Bounded function #Differential geometry #Generalization #Geometric Analysis and Curvature Flows #Geometric and Algebraic Topology #Homeomorphism (graph theory) #Homotopy and Cohomology in Algebraic Topology #Injective function #Isospectral #Orbifold #Subsequence #math.DG #msc:53C20 #msc:53C23 #msc:58J53
paper · pdf · doi:10.1007/s10455-011-9270-4
published in Annals of Global Analysis and Geometry 41(1), 47-59 (Springer Science+Business Media) · To appear in Ann. Glob. Anal. Geom
openalex publication_date 2011/05/23 · arxiv created 2011/06/14 · arxiv updated 2011/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that any collection of n-dimensional orbifolds with sectional curvature and volume uniformly bounded below, diameter bounded above, and with only isolated singular points contains orbifolds of only finitely many orbifold homeomorphism types. This is a generalization to the orbifold category of a similar result for manifolds proven by Grove, Petersen, and Wu. It follows that any Laplace isospectral collection of orbifolds with sectional curvature uniformly bounded below and having only isolated singular points also contains only finitely many orbifold homeomorphism types. The main steps of the argument are to show that any sequence from the collection has subsequence that converges to an orbifold, and then to show that the homeomorphism between the underlying spaces of the limit orbifold and an orbifold from the subsequence that is guaranteed by Perelman's stability theorem must preserve orbifold structure.