Results 51 to 60 of about 1,071 (142)
Quantizing quantum Ricci curvature
, 2018 15 pages, 7 ...
Klitgaard, N., Loll, R.
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A Re‐Examination of Foundational Elements of Cosmology
Fortschritte der Physik, Volume 74, Issue 3, March 2026.ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley +1 more source
Curvature cones and the Ricci flow. [PDF]
Séminaire de théorie spectrale et géométrie, 2014 This survey reviews some facts about nonnegativity conditions on the curvature tensor of a Riemannian manifold which are preserved by the action of the Ricci flow. The text focuses on two main points.First we describe the known examples of preserved curvature conditions and how they have been used to derive geometric results, in particular sphere ...
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River Research and Applications, Volume 42, Issue 3, Page 580-593, March 2026.ABSTRACT Accurately predicting open‐channel flow under complex conditions remains a challenge. This study introduces a novel synergetic self‐adaptive data assimilation (DA) framework, using a proportional‐integral‐derivative (PID) controller to dynamically calibrate the bed roughness parameter k s in a shallow‐water equation model (via the momentum ...
M. Almetwally Ahmed, S. Samuel Li
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Journal of Food Science, Volume 91, Issue 3, March 2026.ABSTRACT This study examines hydroxytyrosol (HXT), a natural antioxidant, as a partial substitute for curing agents in fermented dry‐cured organic sausages. Increasing health concerns regarding nitrates/nitrites, along with EU efforts to reduce their use, highlight the need for alternatives.
Immaculada Argemí‐Armengol +3 more
wiley +1 more source
Pediatric Allergy and Immunology, Volume 37, Issue 3, March 2026.Abstract Background Panallergens are ubiquitously expressed molecules that may drive IgE sensitization across diverse allergen sources, thereby shaping complex clinical phenotypes such as asthma and pollen–food allergy syndrome (PFAS). Although several panallergen families have been extensively characterized, unexplained sensitization patterns are ...
Wilhelm Sponholz +36 more
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Toral symmetries of collapsed ancient solutions to the homogeneous Ricci flow
Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.Abstract Collapsed ancient solutions to the homogeneous Ricci flow on compact manifolds occur only on the total space of principal torus bundles. Under an algebraic assumption that guarantees flowing through diagonal metrics and a tameness assumption on the collapsing directions, we prove that such solutions have additional symmetries, that is, they ...
Anusha M. Krishnan +2 more
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Deeper Exploiting Graph Structure Information by Discrete Ricci Curvature in a Graph Transformer. [PDF]
Entropy (Basel), 2023 Lai X, Liu Y, Qian R, Lin Y, Ye Q.
europepmc +1 more source
Bakry-Émery Ricci Curvature Bounds for Doubly Warped Products of Weighted Spaces. [PDF]
J Geom Anal, 2022 Fathi Z, Lakzian S.
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On the existence of isoperimetric regions in manifolds with nonnegative Ricci curvature and Euclidean volume growth. [PDF]
Calc Var Partial Differ Equ, 2022 Antonelli G +3 more
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