Results 31 to 40 of about 20,351 (298)

Rigidity through a Projective Lens

open access: yesApplied Sciences, 2021
In this paper, we offer an overview of a number of results on the static rigidity and infinitesimal rigidity of discrete structures which are embedded in projective geometric reasoning, representations, and transformations.
Anthony Nixon   +2 more
doaj   +1 more source

The curious case of large-N expansions on a (pseudo)sphere

open access: yesNuclear Physics B, 2015
We elucidate the large-N dynamics of one-dimensional sigma models with spherical and hyperbolic target spaces and find a duality between the Lagrange multiplier and the angular momentum.
Alexander M. Polyakov   +2 more
doaj   +1 more source

A compact spherical RGBD keyframe-based representation [PDF]

open access: yes2015 IEEE International Conference on Robotics and Automation (ICRA), 2015
— This paper proposes an environmental representation approach based on hybrid metric and topological maps as a key component for mobile robot navigation. Focus is made on an ego-centric pose graph structure by the use of Keyframes to capture the local properties of the scene.
Gokhool, Tawsif   +3 more
openaire   +2 more sources

Spherical Harmonics Ylm(θ,ϕ): Positive and Negative Integer Representations of su(1,1) for l-m and l+m

open access: yesAdvances in High Energy Physics, 2016
The azimuthal and magnetic quantum numbers of spherical harmonics Ylm(θ,ϕ) describe quantization corresponding to the magnitude and z-component of angular momentum operator in the framework of realization of su(2) Lie algebra symmetry.
H. Fakhri
doaj   +1 more source

Redundancy of Triangle Groups in Spherical CR Representations [PDF]

open access: yesExperimental Mathematics, 2021
Falbel, Koseleff and Rouillier computed a large number of boundary unipotent CR representations of fundamental groups of non compact three-manifolds. Those representations are not always discrete. By experimentally computing their limit set, one can determine that those with fractal limit sets are discrete. Many of those discrete representations can be
openaire   +2 more sources

Efficient Spherical Harmonics Representation of 3D Objects [PDF]

open access: yes15th Pacific Conference on Computer Graphics and Applications (PG'07), 2007
In this paper, we present a new and efficient spherical harmonics decomposition for spherical functions defining 3D triangulated objects. Such spherical functions are intrinsically associated to star-shaped objects. However, our results can be extended to any triangular object after segmentation into star-shaped surface patches and recomposition of the
Mousa, Mohamed   +3 more
openaire   +2 more sources

Intuitionistic fuzzy sets: Spherical representation and distances [PDF]

open access: yesInternational Journal of Intelligent Systems, 2009
In Intuitionistic Fuzzy Set (IFS) theory more than 10 different geometrical interpretations are constructed. In the paper, two (the most popular) of them are discussed. A new -- spherical -- geometrical representation of the IFSs is described. The idea for it was introduced for the first time by \textit{I.
Yingjie Yang, Francisco Chiclana
openaire   +1 more source

The Class of (p,q)-spherical Distributions with an Extension of the Sector and Circle Number Functions

open access: yesRisks, 2017
For evaluating the probabilities of arbitrary random events with respect to a given multivariate probability distribution, specific techniques are of great interest.
Wolf-Dieter Richter
doaj   +1 more source

New exact static solutions of Einstein-Maxwell field equations with a magnetic dipole

open access: yesResults in Physics, 2021
The Bonnor field shed light on imposition of two magnetic poles, both with mass m, and strengths -m and m, that are situated at a coordinate distance 2b on a symmetry axis.
Sachin Kumar   +3 more
doaj   +1 more source

Database of Spherical Harmonic Representations of Sound Source Directivities

open access: yes, 2020
This is a database of complete spherical harmonic representations of the directivities of sound sources. The data are provided as impulse responses that represent the directivity of the given source in a given discrete direction.
Jens Ahrens
core   +1 more source

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