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19972026
most citedThe Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III

2.5k citations

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20 papers · 1 filter

math.DG2025

On the existence of a balanced vertex in geodesic nets with three boundary vertices

Duc Toan Nguyen

Geodesic nets are types of graphs in Riemannian manifolds where each edge is a geodesic segment. One important object used in the construction of geodesic nets is a balanced vertex…

math.DG2020

A conformal characterization of manifolds of constant sectional curvature

Xiaoyang Chen, Francisco Fontenele, Frederico Xavier

A special case of the main result states that a complete -connected Riemannian manifold is isometric to one of the models , , of…

math.DG2019

New cohomological invariants of foliations

Georges Habib, Ken Richardson

Given a smooth foliation on a closed manifold, basic forms are differential forms that can be expressed locally in terms of the transverse variables. The space of basic forms yield…

math.DG2017★ 3 cited

Basic Dolbeault cohomology and Weitzenböck frmulas on transversely Kähler foliations

Seoung Dal Jung, Ken Richardson

We study basic Dolbeault cohomology and find new Weitzenböck formulas on a transversely Kähler foliation. We investigate conditions on mean curvature and Ricci curvature that impos…

math.DG2017

Singular Riemannian flows and characteristic numbers

Igor Prokhorenkov, Ken Richardson

Let be an even-dimensional, oriented closed manifold. We show that the restriction of a singular Riemannian flow on to a small tubular neighborhood of each connected compon…

math.DG2017

Homotopy invariance of cohomology and signature of a riemannian foliation

Georges Habib, Ken Richardson

We prove that any smooth foliation that admits a Riemannian foliation structure has a well-defined basic signature, and this geometrically defined invariant is actually a foliated…