Results 101 to 110 of about 28,626 (211)
Chern Flat and Chern Ricci-Flat Twisted Product Hermitian Manifolds
MathematicsLet (M1,g) and (M2,h) be two Hermitian manifolds. The twisted product Hermitian manifold (M1×M2f,G) is the product manifold M1×M2 endowed with the Hermitian metric G=g+f2h, where f is a positive smooth function on M1×M2.
Shuwen Li +3 more
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Advanced Optical Materials, Volume 13, Issue 23, August 14, 2025.Theoretical lessons are key for molecules presenting an inverted singlet‐triplet excited state (e.g. S1 and T1) energy difference. This perspective provides a snapshot of the role played by calculations in last years, not only to anticipate experimental findings but also for driving high‐throughput virtual screenings, as well as the main challenge to ...
Ángel José Pérez‐Jiménez +2 more
wiley +1 more source
Pseudohermitian geometry on contact Riemannian manifolds [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 2002 Starting from work by S. Tanno, [39], and E. Barletta et al., [3], we study the geometry of (possibly non integrable) almost CR structures on contact Riemannian manifolds.
David E. Blair, Sorin Dragomir
doaj
Matter field Kähler metric in heterotic string theory from localisation
Journal of High Energy Physics, 2018 We propose an analytic method to calculate the matter field Kähler metric in heterotic compactifications on smooth Calabi-Yau three-folds with Abelian internal gauge fields.
Ştefan Blesneag +4 more
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Gap Theorems for Locally Conformally Flat Manifolds [PDF]
, 2015 In this paper, we prove a gap result for a locally conformally flat complete non-compact Riemannian manifold with bounded non-negative Ricci curvature and a scalar curvature average condition.
Ma, Li
core
Fortschritte der Physik, Volume 73, Issue 8, August 2025.Abstract In this study, the properties, equilibrium, and stability of compact objects within the framework of teleparallel gravity with the generalized MIT bag model are investigated. By incorporating the modified field equations, the influence of the generalized bag constant on the structure and physical characteristics of quark stars and neutron ...
Sayantan Ghosh +2 more
wiley +1 more source
Kummer-type constructions of almost Ricci-flat 5-manifolds
Annals of Global Analysis and Geometry, 2023 A smooth closed manifold $M$ is called almost Ricci-flat if $$\inf_g||\textrm{Ric}_g||_\infty\cdot \textrm{diam}_g(M)^2=0$$ where $\textrm{Ric}_g$ and $\textrm{diam}_g$ denote the Ricci tensor and the diameter of $g$ respectively and $g$ runs over all Riemannian metrics on $M$.
openaire +2 more sources
Proceedings of the London Mathematical Society, Volume 131, Issue 2, August 2025.Abstract We study fine properties of the principal frequency of clamped plates in the (possibly singular) setting of metric measure spaces verifying the RCD(0,N)${\sf RCD}(0,N)$ condition, that is, infinitesimally Hilbertian spaces with nonnegative Ricci curvature and dimension bounded above by N>1$N>1$ in the synthetic sense.
Alexandru Kristály, Andrea Mondino
wiley +1 more source
Journal of Animal Ecology, Volume 94, Issue 7, Page 1410-1421, July 2025.The interannual stability of the carabid biomass in agricultural fields can be maximised by supporting the in‐field mean alpha‐richness that reduces their temporal beta‐diversity. Increasing crop phenology diversity at the landscape level also stabilises carabid biomass over time. Abstract While the temporal stability of plant communities has been well
Lucile Muneret +9 more
wiley +1 more source
Symbolic approximations to Ricci-flat metrics via extrinsic symmetries of Calabi–Yau hypersurfaces
Machine Learning: Science and TechnologyEver since Yau’s non-constructive existence proof of Ricci-flat metrics on Calabi–Yau (CY) manifolds, finding their explicit construction remains a major obstacle to development of both string theory and algebraic geometry.
Viktor Mirjanić, Challenger Mishra
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