Results 91 to 100 of about 3,220 (254)
Anisotropic dark energy from string compactifications
Journal of High Energy PhysicsWe explore the cosmological dynamics of a minimalistic yet generic string-inspired model for multifield dark energy. Adopting a supergravity four-dimensional viewpoint, we motivate the model’s structure arising from superstring compactifications ...
Diego Gallego +2 more
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Establishing Shape Correspondences: A Survey
Computer Graphics Forum, EarlyView.Abstract Shape correspondence between surfaces in 3D is a central problem in geometry processing, concerned with establishing meaningful relations between surfaces. While all correspondence problems share this goal, specific formulations can differ significantly: Downstream applications require certain properties that correspondences must satisfy ...
A. Heuschling, H. Meinhold, L. Kobbelt
wiley +1 more source
Some results on almost Ricci solitons and geodesic vector fields
Beiträge zur Algebra und Geometrie / Contributions to Algebra and Geometry, 2017 An almost Ricci soliton is a Riemannian manifold \((M, g)\) satisfying the conditon \(\mathcal{L}_Vg=2\text{Ric}(g)=2\lambda g\), where \(V\) is a smooth vector field, \(\text{Ric}\) is the Ricci tensor of \(g\), \(\mathcal{L}_V\) is the Lie derivative along \(V\), and \(\lambda\) is a real smooth function on \(M\).
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Existence of periodic orbits for geodesible vector fields on closed 3-manifolds [PDF]
Ergodic Theory and Dynamical Systems, 2009 AbstractIn this paper we deal with the existence of periodic orbits of geodesible vector fields on closed 3-manifolds. A vector field is geodesible if there exists a Riemannian metric on the ambient manifold making its orbits geodesics. In particular, Reeb vector fields and vector fields that admit a global section are geodesible.
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Embedding Optimization of Layouts via Distortion Minimization
Computer Graphics Forum, EarlyView.Abstract Given an embedding of a layout in the surface of a target mesh, we consider the problem of optimizing the embedding geometrically. Layout embeddings partition the surface into multiple disk‐like patches, making them particularly useful for parametrization and remeshing tasks, such as quad‐remeshing, since these problems can then be solved on ...
A. Heuschling, I. Lim, L. Kobbelt
wiley +1 more source
CANRIG: Cross‐Attention Neural Face Rigging with Variable Local Control
Computer Graphics Forum, EarlyView.Abstract Facial animation is one of the most labor‐intensive aspects of animation and VFX, as traditional rigging consumes weeks of expert time and forces animators to spend countless hours manipulating hundreds of controls to achieve varied expressions.
Arad Mohammadi +6 more
wiley +1 more source
Relativistic Thermal Emission from Accretion Disks in Kerr-MOG Spacetimes
The Astrophysical JournalIn scalar–tensor–vector gravity (STVG, also known as MOG), a massive vector field ϕ _μ generates a repulsive fifth force that endows rotating black holes with a gravitational charge $Q\propto \sqrt{\alpha }\,M$ , modifying the near-horizon geometry ...
Cheng Liu +3 more
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Geometry‐Aware Alignment and Comparison of Hierarchical Morse Complexes with Applications
Computer Graphics Forum, EarlyView.Abstract Scalar fields derived from 3D X‐ray CT scans of samples undergoing ex situ processes, such as thermal aging, chemical etching, or mechanical stress, pose unique challenges for characterizing similarities and differences across acquisitions. Typically, a sample A (source) is imaged, removed, and subjected to experimental conditions that alter ...
Aniketh Venkat +3 more
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European Physical Journal C: Particles and FieldsWe investigate the polarization properties of the direct images of a geometrically and optically thin accretion disk around fully self-consistent models of Kerr black holes with synchronized scalar hair.
Valentin O. Deliyski +4 more
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Nuclear Physics BThe primary objective of the article is to investigate the symmetry and pseudosymmetry properties of the Reissner-Nordström-de Sitter (briefly, RNdS) spacetime. The secondary aim of the paper is to explore the notion of Ricci solitons in RNdS spacetimes.
Absos Ali Shaikh, Kamiruzzaman
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