Results 111 to 120 of about 912,180 (214)
European Physical Journal C: Particles and FieldsWe elaborate on nonmetric geometric flow theory and metric-affine gravity with applications in modern cosmology. Two main motivations for our research follow from the facts that (1) cosmological models for f(Q) modified gravity theories, MGTs, are ...
Laurenţiu Bubuianu +4 more
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Mapping Organized Crime as a Stakeholder: A Risk‐Based and Responsive Governance Perspective
Regulation &Governance, EarlyView.ABSTRACT Organized crime (OC) can influence firms through coercion, collusion, financial ties, and supply‐chain relationships, yet these interactions remain underexamined in stakeholder theory. This article conceptualizes organized crime as an analytically relevant but non‐normatively legitimate stakeholder and develops a risk‐based framework combining
Giovanni Scirè, Enzo Bivona
wiley +1 more source
Singularities of Connection Ricci Flow and Ricci Harmonic Flow
, 2013 In this paper, we study the singularities of two extended Ricci flow systems --- connection Ricci flow and Ricci harmonic flow using newly-defined curvature quantities. Specifically, we give the definition of three types of singularities and their corresponding singularity models, and then prove the convergence. In addition, for Ricci harmonic flow, we
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Combinatorial Ricci Flows on Surfaces
Journal of Differential Geometry, 2003 We show that the analog of Hamilton's Ricci flow in the combinatorial setting produces solutions which converge exponentially fast to Thurston's circle packing on surfaces. As a consequence, a new proof of Thurston's existence of circle packing theorem is obtained. As another consequence, Ricci flow suggests a new algorithm to find circle packings.
Chow, Bennett, Luo, Feng
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Ricci flows on surfaces related to the Einstein weyl and Abelian vortex equations
, 2014 There are described equations for a pair comprising a Riemannian metric and a Killing field on a surface that contain as special cases the Einstein Weyl equations (in the sense of D.
Fox, Daniel Jeremy Forrest
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Instantaneously complete Ricci flows on surfaces [PDF]
, 2012 The intention of this thesis is to give a survey of instantaneously complete Ricci flows on surfaces, focussing on the existence and uniqueness of its Cauchy problem.
Giesen, Gregor
core
The Ricci flow on the 2-sphere
Journal of Differential Geometry, 1991 The classical uniformization theorem, interpreted differential geomet-rically, states that any Riemannian metric on a 2-dimensional surface ispointwise conformal to a constant curvature metric. Thus one can con-sider the question of whether there is a natural evolution equation whichconformally deforms any metric on a surface to a constant curvature ...
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Ancient and expanding spin ALE Ricci flows [PDF]
We classify spin ALE ancient Ricci flows and spin ALE expanding solitons with suitable groups at infinity. In particular, the only spin ancient Ricci flows with groups at infinity in $SU(2)$ and mild decay at infinity are hyperkähler ALE metrics.
Lopez, Isaac M., Ozuch, Tristan
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Myelin Maintenance and Addition Regulate Synaptic Plasticity in the Adult Mouse Cortex
Glia, Volume 74, Issue 12, December 2026.We report that existing myelin allows neurons to remain plastic throughout life, while new myelin progressively stabilises synapses along the basal but not apical dendrites of layer V pyramidal neurons in the motor cortex. ABSTRACT Myelin has the capacity to affect synapse number or plasticity across the lifespan.
Renee E. Pepper +9 more
wiley +1 more source
Almost Kaehler Ricci Flows and Einstein and Lagrange-Finsler Structures on Lie Algebroids
, 2013 In this work we investigate Ricci flows of almost Kaehler structures on Lie algebroids when the fundamental geometric objects are completely determined by (semi) Riemannian metrics, or effective) regular generating Lagrange/ Finsler, functions. There are
Vacaru, Sergiu I.
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