Results 61 to 70 of about 71,917 (238)

Discrete Ollivier-Ricci curvature

, 2022
We analyze both continuous and discrete-time Ollivier-Ricci curvatures of locally-finite weighted graphs $\G$ equipped with a given distance "$\dist$" (w.r.t. which $\G$ is metrically complete) and for general random walks. We show the continuous-time Ollivier-Ricci curvature is well-defined for a large class of Markovian and non-Markovian random walks
Fathi, Zohreh, Lakzian, Sajjad
openaire   +2 more sources

Policy Evaluation for Climate Mitigations in the European Agricultural Sector—A Comparison of Policy Options at Micro and Macro Level

Australian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT The purpose of this paper is to discuss the micro‐ and macro‐outcomes for the standard neoclassical carbon tax (whose burden falls on the producers) versus the implication of a budget neutral, performance‐based EU Common Agricultural Policy (CAP) focusing on non‐CO2 emission (N2O and CH4, measured in CO2eq) reduction, especially in the ...
John Helming, Elisa Bardazzi, David Schaefer, Hugo Scherer, Zuzana Smeets Kristkova   +4 more
wiley   +1 more source

On some m-th root metrics

AIMS Mathematics
The Ricci curvature in Finsler geometry naturally generalizes the Ricci curvature in Riemannian geometry. In this paper, we study the -th root metric with weakly isotropic scalar curvature and obtain that its scalar curvature must vanish.
Xiaoling Zhang, Cuiling Ma, Lili Zhao
doaj   +1 more source

Rigidity of Complete Gradient Shrinkers with Pointwise Pinching Riemannian Curvature

Advances in Mathematical Physics, 2021
Let Mn,g,f be a complete gradient shrinking Ricci soliton of dimension n≥3. In this paper, we study the rigidity of Mn,g,f with pointwise pinching curvature and obtain some rigidity results.
Yawei Chu, Dehe Li, Jundong Zhou
doaj   +1 more source

POSITIVITY OF RICCI CURVATURE UNDER THE KÄHLER–RICCI FLOW [PDF]

Communications in Contemporary Mathematics, 2006
In each complex dimension n ≥ 2, we construct complete Kähler manifolds of bounded curvature and non-negative Ricci curvature whose Kähler–Ricci evolutions immediately acquire Ricci curvature of mixed sign.
openaire   +2 more sources

Basophil Activation Test as Biomarker of Severity and Threshold of Allergic Reactions to Cow's Milk During Oral Food Challenges

Allergy, EarlyView.
The threshold of reactivity during fresh milk challenges was 70% lower than that of baked milk challenges, reflecting the higher allergenicity of fresh milk. BAT was the only biomarker statistically significantly different between severity and threshold groups, for baked milk and fresh milk allergies, respectively.
Holly Boyd, Irene Bartha, Ru‐Xin Foong, Marta Krawiec, Andreina Marques‐Mejias, Hannah F. Marshall, Suzana Radulovic, Faye Harrison, Grammatiki Antoneria, Zainab Jama, Matthew Kwok, Ewa Pietraszewicz, Malak Eghleilib, Cristian Ricci, Tom Marrs, Gideon Lack, George Du Toit, Alexandra F. Santos   +17 more
wiley   +1 more source

Stability of China’s Stock Market: Measure and Forecast by Ricci Curvature on Network

Complexity, 2023
The systemic stability of a stock market is one of the core issues in the financial field. The market can be regarded as a complex network whose nodes are stocks connected by edges that signify their correlation strength.
Xinyu Wang, Liang Zhao, Ning Zhang, Liu Feng, Haibo Lin   +4 more
doaj   +1 more source

Optimal transport and timelike lower Ricci curvature bounds on Finsler spacetimes [PDF]

, 2023
Mathias Braun, Shin‐ichi Ohta
openalex   +1 more source

Rigidity of almost Ricci solitons on compact Riemannian manifolds

AIMS Mathematics
Considering an almost Ricci soliton (ARS) $ \left(N, g, \eta, \kappa \right) $ on a compact Riemannian manifold $ (N, g) $, we use the Ricci curvature in the direction of the potential vector field $ \eta $ to derive necessary and sufficient conditions ...
Mohammed Guediri, Norah Alshehri
doaj   +1 more source

Representativeness of the Natura 2000 network for preserving plant biodiversity in the European Union

Conservation Biology, EarlyView.
Abstract The Natura 2000 (N2K) network of protected areas is one of the main tools for area‐based conservation in the European Union (EU), yet its role in preserving plant biodiversity requires better understanding. We examined data kept in the European Vegetation Archive from over 1.2 million vegetation plots and obtained over 14.2 million plant ...
Michele Di Musciano, Piero Zannini, Riccardo Testolin, Francesco Maria Sabatini, Diletta Santovito, Borja Jiménez‐Alfaro, Florian Jansen, Milan Chytrý, Lorenzo Ricci, Emiliano Agrillo, Fabio Attorre, Idoia Biurrun, Gianmaria Bonari, Hans Henrik Bruun, Luigi Cao Pinna, Andraž Čarni, Maria Laura Carranza, Roberto Cazzolla Gatti, Jürgen Dengler, Michele De Sanctis, Úna Fitzpatrick, Anna Rita Frattaroli, Emmanuel Garbolino, Stephan Hennekens, Ute Jandt, Jan Jansen, Zygmunt Kacki, Ilona Knollová, Jonathan Lenoir, Jesper Erenskjold Moeslund, Tomáš Peterka, Nataša Pipenbaher, Duccio Rocchini, Eszter Ruprecht, Solvita Rūsiņa, Urban Šilc, Sonja Škornik, Grzegorz Swacha, Milan Valachovič, Kiril Vassilev, Wolfgang Willner, Alessandro Chiarucci   +41 more
wiley   +1 more source