Results 111 to 120 of about 87,863 (252)
Pediatric Allergy and Immunology, Volume 36, Issue 3, March 2025.Abstract Background This study aimed to investigate sensitization to eggs and other common allergenic foods, allergic symptoms, and fatty acid status among infants after introducing daily eggs as a complementary food for 6 months. Methods This secondary analysis used data from a randomized controlled trial of 500 infants aged 6–9 months in Jouberton ...
Regina Nakiranda +9 more
wiley +1 more source
Hessian comparison and eigenvalue estimate of almost Hermitian manifolds [PDF]
arXiv, 2012 In this paper, by using the Bochner technique on almost Hermitian manifolds, we obtain a complex Hessian comparison for almost Hermitian manifolds generalizing the Laplacian comparison for almost Hermitian manifolds by Tossati, and reprove a diameter estimate for almost Hermitian manifolds by Gray.
arxiv
All two‐dimensional expanding Ricci solitons
Journal of the London Mathematical Society, Volume 111, Issue 3, March 2025.Abstract The second author and H. Yin [Ars Inveniendi Analytica. DOI 10.15781/4x5c-9q97] have developed a Ricci flow existence theory that gives a complete Ricci flow starting with a surface equipped with a conformal structure and a non‐atomic Radon measure as a volume measure. This led to the discovery of a large array of new expanding Ricci solitons.
Luke T. Peachey, Peter M. Topping
wiley +1 more source
Topological rigidity of quasitoric manifolds [PDF]
arXiv, 2013 Quasitoric manifolds are manifolds that admit an action of the torus that is locally as the standard action of T^n on C^n. It is known that the quotients of such actions are nice manifolds with corners. We prove that such manifolds are equivariantly rigid i.e., that any other manifold that is T^n-homotopy equivalent to a quasitoric manifold, is T^n ...
arxiv
$η$-Normality, CR-structures, para-CR structures on almost contact metric and almost paracontact metric manifolds [PDF]
arXiv, 2020 For almost contact metric or almost paracontact metric manifolds there is natural notion of $\eta$-normality. Manifold is called $\eta$-normal if is normal along kernel distribution of characteristic form. In the paper it is proved that $\eta$-normal manifolds are in one-one correspondence with Cauchy-Riemann almost contact metric manifolds or para ...
arxiv
$T^4$ fibrations over Calabi-Yau two-folds and non-Kahler manifolds in string theory [PDF]
, 2016 We construct a geometric model of eight-dimensional manifolds and realize them in the context of type II string theory. These eight-manifolds are constructed by non-trivial $T^{4}$ fibrations over Calabi-Yau two-folds. These give rise to eight-dimensional non-Kahler Hermitian manifolds with $SU(4)$ structure.
arxiv +1 more source
On the geometry of trans-para-Sasakian manifolds [PDF]
arXiv, 2018 In this paper, we introduce the trans-para-Sasakian manifolds and we study their geometry. These manifolds are an analogue of the trans-Sasakian manifolds in the Riemannian geometry. We shall investigate many curvature properties of these manifolds and we shall give many conditions under which the manifolds are either $\eta-$Einstein or Einstein ...
arxiv
On cobordism of generalized (real) Bott manifolds [PDF]
arXiv, 2017 We show that all generalized (real) Bott manifolds which are (small covers) quasitoric manifolds over a product of simplices $\Delta^{n_1}\times\cdots\times\Delta^{n_r}\times\Delta^{1}$ are always boundaries of some manifolds. But these manifolds with the natural $(\mathbb{Z}_2)^n$ action do not necessarily bound equvariantly.
arxiv
On LP-Kenmotsu Manifold with Regard to Generalized Symmetric Metric Connection of Type (α, β)
MathematicsIn the current article, we examine Lorentzian para-Kenmotsu (shortly, LP-Kenmotsu) manifolds with regard to the generalized symmetric metric connection ∇G of type (α,β).
Doddabhadrappla Gowda Prakasha +3 more
doaj +1 more source
An attempt to geometrize electromagnetism
Open Physics, 2018 This study investigates the curved worldline of a charged particle accelerated by an electromagnetic field in flat spacetime. A new metric, which dependes on the charge-to-mass ratio and electromagnetic potential, is proposed to describe the curve ...
Huang XiuLin, Xu Yan, Liu ChengZhi
doaj +1 more source