International Journal of Dental Hygiene, Volume 21, Issue 1, Page 77-94, February 2023., 2023 Abstract Aim To establish the efficacy of oscillating‐rotating power toothbrush (OR‐PTB) compared to high‐frequency sonic power toothbrush (HFS‐PTB) on improving parameters of plaque and gingival inflammation. Safety and participants' preference were secondary interests. Materials and methods MEDLINE‐PubMed and Cochrane‐CENTRAL databases were searched,
Eveline van der Sluijs +4 more
wiley +1 more source
On noncollapsed almost Ricci-flat 4-manifolds [PDF]
American Journal of Mathematics, 2019 We give topological conditions to ensure that a noncollapsed almost Ricci-flat 4-manifold admits a Ricci-flat metric. One sufficient condition is that the manifold is spin and has a nonzero A-hat genus. Another condition is that the fundamental group is infinite or, more generally, of sufficiently large cardinality.
Vitali Kapovitch, John Lott
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Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement
Geophysical Monograph Series, Page 27-82., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm +2 more
wiley +1 more source
On the local extension of Killing vector-fields in Ricci flat manifolds [PDF]
Journal of the American Mathematical Society, 2012 We revisit the extension problem for Killing vector-fields in smooth Ricci flat manifolds, and its relevance to the black hole rigidity problem. We prove both a stronger version of the main local extension result established earlier, as well as two types of results concerning non-extendibility. In particular, we show that one can find local, stationary,
Alexandru D. Ionescu, Sergiù Klainerman
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Conformal holonomy of C-spaces, Ricci-flat, and Lorentzian manifolds
Differential Geometry and its Applications, 2006 30 pages, revised versions: typos corrected, references added, in v4 error in Theorem 4.2 ...
Thomas Leistner
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Infinite families of homogeneous Bismut Ricci flat manifolds
Communications in Contemporary Mathematics, 2022 Starting from compact symmetric spaces of inner type, we provide infinite families of compact homogeneous spaces carrying invariant non-flat Bismut connections with vanishing Ricci tensor. These examples turn out to be generalized symmetric spaces of order [Formula: see text] and (up to coverings) they can be realized as minimal submanifolds of the ...
Fabio Podestà, Alberto Raffero
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Some notes on the tangent bundle with a Ricci quarter-symmetric metric connection
AIMS Mathematics, 2023 Let $ (M, g) $ be an $ n $-dimensional (pseudo-)Riemannian manifold and $ TM $ be its tangent bundle $ TM $ equipped with the complete lift metric $ ^{C}g $.
Yanlin Li, Aydin Gezer, Erkan Karakaş
doaj +1 more source
On the Perelman’s reduced entropy and Ricci flat manifolds with maximal volume growth [PDF]
Mathematische Annalen, 2012 9 ...
Liang Cheng, Anqiang Zhu
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Evolution of the Weyl Tensor under the Ricci Flow [PDF]
, 2011 We compute the evolution equation of the Weyl tensor under the Ricci flow of a Riemannian manifold and we discuss some consequences for the classification of locally conformally flat Ricci ...
Catino, Giovanni, Mantegazza, Carlo
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Ricci-Flat Metrics on Vector Bundles Over Flag Manifolds [PDF]
Communications in Mathematical Physics, 2020 AbstractWe construct explicit complete Ricci-flat metrics on the total spaces of certain vector bundles over flag manifolds of the group SU(n), for all Kähler classes. These metrics are natural generalizations of the metrics of Candelas–de la Ossa on the conifold, Pando Zayas–Tseytlin on the canonical bundle over $$\mathbb {CP}^1\times \mathbb {CP}^1 ...
Dmitri Bykov +2 more
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