Results 111 to 120 of about 73,082 (280)

Ricci Curvature Bounds and Einstein Metrics on Compact Manifolds [PDF]

, 1989
Michael T. Anderson
openalex   +1 more source

Laplace operators on Sasaki-Einstein manifolds [PDF]

Journal of High Energy Physics, 2014
6 ...
openaire   +4 more sources

Zeitgeist and Ortgeist: Time and Place in Institutional Creation

British Journal of Management, EarlyView.
Abstract How are institutions created is one of the most interesting questions in institutional theory. Some strands of literature favour heroic explanations: mythologizing individuals with vision, tenacity and drive and putting these individuals on the pedestal of the institution.
Sabina Keston‐Siebert, Kevin Orr
wiley   +1 more source

Characterizing ϕRic-Vector Fields and Quasi-Einstein Manifolds on Multiply Warped Product Manifolds

International Journal of Mathematics and Mathematical Sciences
We characterize multiply warped product manifolds with ϕRic-vector fields. We give the necessary and sufficient conditions for the lift of a vector field on a factor manifold to be the ϕRic-vector field.
Moctar Traore, Ameth Ndiaye, Mansour Sane   +2 more
doaj   +1 more source

There Are No Conformal Einstein Rescalings of Pseudo-Riemannian Einstein Spaces with n Complete Light-Like Geodesics

Mathematics, 2019
In the present paper, we study conformal mappings between a connected n-dimension pseudo-Riemannian Einstein manifolds. Let g be a pseudo-Riemannian Einstein metric of indefinite signature on a connected n-dimensional manifold M.
Josef Mikeš, Irena Hinterleitner, Nadezda Guseva   +2 more
doaj   +1 more source

Moduli spaces of Einstein metrics on 4-manifolds [PDF]

, 1989
Michael T. Anderson
openalex   +1 more source

Genomic technologies and the diagnosis of 46, XY differences of sex development

Andrology, EarlyView.
Abstract Differences/disorders of sex development can be caused by disruptions to the molecular and cellular mechanisms that control development and sex determination of the reproductive organs with 1:100 live births affected. Multiple genes are associated with 46, XY differences/disorders of sex development that can cause varying clinical phenotypes ...
Firman Idris, Andrew H. Sinclair, Katie L. Ayers   +2 more
wiley   +1 more source

N(κ)-paracontact metric manifolds admitting the Fischer-Marsden conjecture

AIMS Mathematics
We characterize $ N(\kappa) $-paracontact metric manifolds (NKPMM) $ M^{2n+1} $ satisfying the Fischer-Marsden conjecture. We demostrate that, if an $ M^{2n+1} $ satisfies the Fischer-Marsden equation, then either $ M^{2n+1} $ with $ \kappa > -1 ...
Sudhakar Kumar Chaubey, Meraj Ali Khan, Amna Salim Rashid Al Kaabi   +2 more
doaj   +1 more source

Einstein manifolds and obstructions to the existence of Einstein metrics [PDF]

Rendiconti di Matematica e delle Sue Applicazioni, 1998
This article is a panorama about Einstein manifolds (which has not to be intended as a complete report on the subject). We have chosen to mention some classical facts which make the notion of Einstein metric worth of investigation, and we discuss how ...
A. Sambusetti
doaj  

Living by the lake: Plant food diversity in a prehistoric lake‐dwelling community in the Republic of North Macedonia

Archaeometry, EarlyView.
Abstract This paper explores the relationship between wetland ecosystems and prehistoric lakeshore settlements within the Lake Ohrid basin (a biodiversity hotspot) by considering plant food systems at Ploča Mičov Grad, North Macedonia. The mid‐fifth millennium (c.4555–4373 to 4437–4241 cal BCE) waterlogged assemblage contained a diverse spectrum of ...
Amy Holguin, Michael Charles, Ferran Antolín, Rachel Ballantyne, Müge Ergun, Albert Hafner, Stefanie Jacomet, André F. Lotter, Goce Naumov, Johannes Reich, Raül Soteras, Elizabeth Stroud, Willy Tinner, Rachel Wood, Amy Bogaard   +14 more
wiley   +1 more source