Min–max minimal hypersurface in manifolds with convex boundary and $${\hbox {Ric}}\ge 0$$ Ric ≥ 0

2018 ◽  
Vol 371 (3-4) ◽  
pp. 1545-1574
Author(s):  
Zhichao Wang
Keyword(s):  
Minimal Hypersurface ◽  
Convex Boundary

The influence of interacting strain rates on turbulence in convex boundary layers

1996 ◽  
Vol 8 (11) ◽  
pp. 3163-3171 ◽  
Author(s):  
Andreas C. Schwarz ◽  
Michael W. Plesniak
Keyword(s):  
Boundary Layers ◽  
Strain Rates ◽  
Convex Boundary

scholarly journals Ricci flow on manifolds with boundary with arbitrary initial metric

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tsz-Kiu Aaron Chow
Keyword(s):  
Ricci Flow ◽  
Positive Curvature ◽  
Curvature Operator ◽  
Manifolds With Boundary ◽  
Convex Boundary ◽  
Uniqueness Of The Solution ◽  
Positive Time ◽  
Natural Boundary Conditions ◽  
Short Time ◽  
Time Existence

Abstract In this paper, we study the Ricci flow on manifolds with boundary. In the paper, we substantially improve Shen’s result [Y. Shen, On Ricci deformation of a Riemannian metric on manifold with boundary, Pacific J. Math. 173 1996, 1, 203–221] to manifolds with arbitrary initial metric. We prove short-time existence and uniqueness of the solution, in which the boundary becomes instantaneously totally geodesic for positive time. Moreover, we prove that the flow we constructed preserves natural boundary conditions. More specifically, if the initial metric has a convex boundary, then the flow preserves positive curvature operator and the PIC1, PIC2 conditions. Moreover, if the initial metric has a two-convex boundary, then the flow preserves the PIC condition.

Closed geodesics in Riemannian manifolds with convex boundary

1994 ◽  
Vol 124 (6) ◽  
pp. 1247-1258 ◽  
Author(s):  
Anna Maria Candela ◽  
Addolorata Salvatore
Keyword(s):  
Riemannian Manifold ◽  
Riemannian Manifolds ◽  
Closed Geodesics ◽  
Convex Boundary

In this paper we look for closed geodesies on a noncomplete Riemannian manifold ℳ. We prove that if ℳ has convex boundary, then there exists at least one closed nonconstant geodesic on it.

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