Results 21 to 30 of about 754 (96)

Ideal boundaries of pseudo-Anosov flows and uniform convergence groups with connections and applications to large scale geometry [PDF]

open access: yes, 2005
Given a general pseudo-Anosov flow in a closed three manifold, the orbit space of the lifted flow to the universal cover is homeomorphic to an open disk. We construct a natural compactification of this orbit space with an ideal circle boundary.
S. Fenley
semanticscholar   +1 more source

A non-geodesic analogue of Reshetnyak’s majorization theorem

open access: yesAnalysis and Geometry in Metric Spaces, 2023
For any real number κ\kappa and any integer n≥4n\ge 4, the Cycln(κ){{\rm{Cycl}}}_{n}\left(\kappa ) condition introduced by Gromov (CAT(κ)-spaces: construction and concentration, Zap. Nauchn. Sem. S.-Peterburg. Otdel. Mat. Inst. Steklov. (POMI) 280 (2001)
Toyoda Tetsu
doaj   +1 more source

Concentration of Product Spaces

open access: yesAnalysis and Geometry in Metric Spaces, 2021
We investigate the relation between the concentration and the product of metric measure spaces. We have the natural question whether, for two concentrating sequences of metric measure spaces, the sequence of their product spaces also concentrates.
Kazukawa Daisuke
doaj   +1 more source

On Weak Super Ricci Flow through Neckpinch

open access: yesAnalysis and Geometry in Metric Spaces, 2021
In this article, we study the Ricci flow neckpinch in the context of metric measure spaces. We introduce the notion of a Ricci flow metric measure spacetime and of a weak (refined) super Ricci flow associated to convex cost functions (cost functions ...
Lakzian Sajjad, Munn Michael
doaj   +1 more source

Filling inequalities do not depend on topology [PDF]

open access: yes, 2008
Gromov's universal filling inequalities relate the filling radius and the filling volume of a Riemannian manifold to its volume. The main result of the present article is that in dimensions at least three the optimal constants in the filling inequalities
Brunnbauer, Michael
core   +1 more source

An optimal lower curvature bound for convex hypersurfaces in Riemannian manifolds [PDF]

open access: yes, 2013
It is proved that a convex hypersurface in a Riemannian manifold of sectional curvature > κ is an Alexandrov’s space of curvature > κ . This theorem provides an optimal lower curvature bound for an older theorem of Buyalo. The purpose of this paper is to
S. Alexander, V. Kapovitch, A. Petrunin
semanticscholar   +1 more source

Asymptotically Mean Value Harmonic Functions in Doubling Metric Measure Spaces

open access: yesAnalysis and Geometry in Metric Spaces, 2022
We consider functions with an asymptotic mean value property, known to characterize harmonicity in Riemannian manifolds and in doubling metric measure spaces.
Adamowicz Tomasz   +2 more
doaj   +1 more source

SPACE OF RICCI FLOWS (II)—PART A: MODULI OF SINGULAR CALABI–YAU SPACES

open access: yesForum of Mathematics, Sigma, 2017
We establish the compactness of the moduli space of noncollapsed Calabi–Yau spaces with mild singularities. Based on this compactness result, we develop a new approach to study the weak compactness of Riemannian manifolds.
XIUXIONG CHEN, BING WANG
doaj   +1 more source

A short proof of Gromov's filling inequality

open access: yes, 2007
We give a very short and rather elementary proof of Gromov's filling volume inequality for n-dimensional Lipschitz cycles (with integer and Z_2-coefficients) in $L^\infty$-spaces.
Wenger, Stefan
core   +3 more sources

A characterization of the $\hat{A}$-genus as a linear combination of Pontrjagin numbers

open access: yes, 2015
We show in this short note that if a rational linear combination of Pontrjagin numbers vanishes on all simply-connected $4k$-dimensional closed connected and oriented spin manifolds admitting a Riemannian metric whose Ricci curvature is nonnegative and ...
Li, Ping
core   +1 more source

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