Results 71 to 80 of about 388,976 (296)
Linear Perturbations of an Exact Gravitational Wave in the Bianchi IV Universe
UniverseThe proper-time method for constructing perturbative dynamical gravitational fields is presented. Using the proper-time method, a perturbative analytical model of gravitational waves against the backdrop of an exact wave solution of Einstein’s equations ...
Konstantin Osetrin
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Einstein - Weyl structures corresponding to diagonal Kähler Bianchi IX metrics [PDF]
Classical and Quantum Gravity, 1997 We analyse in a systematic way the four dimensionnal Einstein-Weyl spaces equipped with a diagonal Kähler Bianchi IX metric. In particular, we show that the subclass of Einstein-Weyl structures with a constant conformal scalar curvature is the one with a conformally scalar flat - but not necessarily scalar flat - metric ; we exhibit its 3-parameter ...
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Business Strategy and the Environment, EarlyView.ABSTRACT Biodiversity underpins ecosystem functioning and the provision of ecosystem services, yet it continues to decline due to intensive agriculture, pollution, habitat loss and climate change. Although ecolabels are increasingly used to communicate sustainability attributes and influence consumer choices, their role in addressing biodiversity ...
Marzieh Aminravan +4 more
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Bianchi III and V Einstein metrics
, 2008 We present diagonal Einstein metrics for Bianchi III and V, both for minkowskian and euclidean signatures and we show that the Einstein Bianchi III metrics have an integrable geodesic flow.
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Hidden Markov graphical models with state‐dependent generalized hyperbolic distributions
Canadian Journal of Statistics, EarlyView.Abstract In this article, we develop a novel hidden Markov graphical model to investigate time‐varying interconnectedness between different financial markets. To identify conditional correlation structures under varying market conditions and accommodate shape features embedded in financial time series, we rely upon the generalized hyperbolic family of ...
Beatrice Foroni +2 more
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Taming singularities and chaos in conformal gravity
European Physical Journal C: Particles and FieldsWe hereby address the cosmological singularity problem in a general gravitational theory invariant under Weyl conformal transformations. In particular, we focus on the Bianchi IX spacetime and we show that both the initial (big bang) and final (big ...
Jiale Gu, Leonardo Modesto, Cosimo Bambi
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Tryon’s Conjecture and Energy and Momentum of Bianchi Type Universes
Advances in High Energy Physics, 2016 The energy and momentum of some diagonal anisotropic Bianchi type Universes are obtained using different energy-momentum complexes in the framework of General Relativity.
Prajyot Kumar Mishra +3 more
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Further results on non-diagonal: Bianchi type III vacuum metrics [PDF]
General Relativity and Gravitation, 2012 21 pages, no ...
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Cultural Pathways to Sustainability: How Organizational Cultures Shape Firms' ESG Performance
Corporate Social Responsibility and Environmental Management, EarlyView.ABSTRACT Understanding how organizational culture shapes firms' environmental, social, and governance (ESG) performance is essential for advancing effective sustainability management. Culture reflects shared values and norms that shape how firms enact ESG principles.
Marianna Delegach +2 more
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Noether Symmetries of Bianchi Type II Spacetime Metrics
, 2015 We classify a class of Bianchi type II spacetimes according to their Noether symmetries. We briefly discuss the conservation laws admitted by these Noether symmetries and classify their possible algebras and determine their structures also.
Tarayrah, Mahmood Rajih +3 more
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