Results 41 to 50 of about 4,659,666 (289)

Eigenvalues and entropies under the harmonic-Ricci flow [PDF]

open access: yes, 2013
In this paper, the author discusses the eigenvalues and entropies under the harmonic-Ricci flow, which is the Ricci flow coupled with the harmonic map flow. We give an alternative proof of results for compact steady and expanding harmonic-Ricci breathers.
Li, Yi
core   +2 more sources

Ricci Flow and Ricci Limit Spaces [PDF]

open access: yes, 2020
I survey some of the developments in the theory of Ricci flow and its applications from the past decade. I focus mainly on the understanding of Ricci flows that are permitted to have unbounded curvature in the sense that the curvature can blow up as we wander off to spatial infinity and/or as we decrease time to some singular time.
openaire   +3 more sources

Space of Ricci Flows I [PDF]

open access: yesCommunications on Pure and Applied Mathematics, 2012
AbstractIn this paper, we study the moduli spaces of m‐dimensional, κ‐noncollapsed Ricci flow solutions with bounded $\int |Rm|^{{m}/{2}}$ and bounded scalar curvature. We show a weak compactness theorem for such moduli spaces and apply it to study the estimates of isoperimetric constants, the Kähler‐Ricci flows, and the moduli spaces of gradient ...
Bing Wang, Xiuxiong Chen
openaire   +3 more sources

Integrative biology of injury in animals

open access: yesBiological Reviews, Volume 98, Issue 1, Page 34-62, February 2023., 2023
ABSTRACT Mechanical injury is a prevalent challenge in the lives of animals with myriad potential consequences for organisms, including reduced fitness and death. Research on animal injury has focused on many aspects, including the frequency and severity of wounding in wild populations, the short‐ and long‐term consequences of injury at different ...
Corey W. Rennolds, Alexandra E. Bely
wiley   +1 more source

Ricci Flow Gravity [PDF]

open access: yesPMC Physics A, 2007
15 pages. V2: improved presentation, in particular Jordan vs. Brans-Dicke and on viability. Added section on physical interpretation. V3: more references.
openaire   +4 more sources

A Derivation of the Ricci Flow

open access: yesJournal of Applied Mathematics and Physics, 2021
In this work, we show that by restricting to the subgroup of time-independent coordinate transformations, then it is possible to derive the Ricci flow from the Bianchi identities. To achieve this, we first show that the field equations of the gravitational field, the Newton’s second law of classical dynamics, and the Maxwell field equations of the ...
openaire   +3 more sources

SOME RESULTS ON ∗−RICCI FLOW [PDF]

open access: yesFacta Universitatis, Series: Mathematics and Informatics, 2021
In this paper we have introduced the notion of ∗-Ricci flow and shown that ∗-Ricci soliton which was introduced by Kaimakamis and Panagiotidou in 2014 which is a self similar soliton of the ∗-Ricci flow. We have also find the deformation of geometric curvature tensors under ∗-Ricci flow.
Dipankar Debnath, Nirabhra Basu
openaire   +2 more sources

Diameter Estimate in Geometric Flows

open access: yesMathematics, 2023
We prove the upper and lower bounds of the diameter of a compact manifold (M,g(t)) with dimRM=n(n≥3) and a family of Riemannian metrics g(t) satisfying some geometric flows. Except for Ricci flow, these flows include List–Ricci flow, harmonic-Ricci flow,
Shouwen Fang, Tao Zheng
doaj   +1 more source

The Chern-Ricci flow on complex surfaces [PDF]

open access: yes, 2012
The Chern-Ricci flow is an evolution equation of Hermitian metrics by their Chern-Ricci form, first introduced by Gill. Building on our previous work, we investigate this flow on complex surfaces. We establish new estimates in the case of finite time non-
Ben Weinkove   +15 more
core   +1 more source

Effect of RNS60 in amyotrophic lateral sclerosis: a phase II multicentre, randomized, double‐blind, placebo‐controlled trial

open access: yesEuropean Journal of Neurology, Volume 30, Issue 1, Page 69-86, January 2023., 2023
Abstract Background and purpose Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with limited treatment options. RNS60 is an immunomodulatory and neuroprotective investigational product that has shown efficacy in animal models of ALS and other neurodegenerative diseases. Its administration has been safe and well tolerated in ALS
Ettore Beghi   +114 more
wiley   +1 more source

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