Results 131 to 140 of about 75,365 (285)

On non-gradient $(m,\rho)$-quasi-Einstein contact metric manifolds. [PDF]

, 2020
Dhriti Sundar Patra, Vladimir Rovenski
openalex   +1 more source

Complex manifolds and Einstein’s equations

, 1982
We present a generalization of Penrose’s twistor theory based on the geometry of rational curves in complex manifolds. The analytical counterpart of this complex geometry consists, in the three simplest cases, of a system of differential equations closely connected with Einstein’s equations.
openaire   +2 more sources

On Einstein, Hermitian 4-manifolds

Journal of Differential Geometry, 2012
Let (M,h) be a compact 4-dimensional Einstein manifold, and suppose that h is Hermitian with respect to some complex structure J on M. Then either (M,J,h) is Kaehler-Einstein, or else, up to rescaling and isometry, it is one of the following two exceptions: the Page metric on CP2 # (-CP2), or the Einstein metric on CP2 # 2 (-CP2) constructed in Chen ...
openaire   +3 more sources

Outsmarting sanctions

American Ethnologist, EarlyView.
Abstract In 2012 the UN Security Council and the European Union bolstered US economic sanctions on Iran, disembedding the country's economy from financial markets. Since then, the sanctions have radically devalued Iran's currency, leading Iranians to seek a viable standard of value elsewhere. They have done so through ghachagh (fugitive) configurations
Emrah Yıldız
wiley   +1 more source

Einstein metrics with prescribed conformal infinity on 4-manifolds [PDF]

, 2001
Michael T. Anderson
openalex   +1 more source

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

Prevalence and Spectrum of Congenital Heart Disease in Individuals With Distal Chromosome 22q11.22–23 Deletions

Clinical Genetics, EarlyView.
The frequency and severity of congenital heart disease vary extensively in individuals with 22q11.22–23 distal deletions. Reduced gene dosage particularly within the low copy repeat (LCR22) D–E region including MAPK1 and HIC2 conveys risk for these defects.
Tanner J. Nelson, Daniel E. McGinn, T. Blaine Crowley, Lydia Rockart, Audrey Green, Victoria Giunta, Oanh Tran, Daniella Miller, Jeroen Breckpot, Ann Swillen, M. Cristina Digilio, Marta Unolt, Carolina Putotto, Federica Pulvirenti, Bruno Marino, Beverly S. Emanuel, Elaine H. Zackai, Zhengdong D. Zhang, Elizabeth Goldmuntz, Erik Boot, Anne S. Bassett, Bernice E. Morrow, Donna M. McDonald‐McGinn   +22 more
wiley   +1 more source

Compactness of conformally compact Einstein manifolds in dimension 4 [PDF]

, 2018
Shinan Chang, Yuxin Ge
openalex   +1 more source

Future workplace reimagination: A multiscenario analysis on entrepreneurial small and medium internationalisers

European Management Review, EarlyView.
Abstract This paper aims to encounter the scholarly demand for comprehensive identification and investigation of the factors that highlight the sense of the “workplace of the future.” Besides, this study sheds in‐depth qualitative and quantitative insights into analysing such drivers in international entrepreneurial small and medium enterprises of ...
Hannan Amoozad Mahdiraji, Fatemeh Yaftiyan, Vahid J. Sadeghi, Demetris Vrontis   +3 more
wiley   +1 more source

Bose-Einstein condensation of scalar fields on hyperbolic manifolds [PDF]

, 1993
Guido Cognola, Luciano Vanzo
openalex   +1 more source