Results 31 to 40 of about 264 (216)

Evolutionary dynamics on a regular networked structured and unstructured multi‐population

International Journal of Robust and Nonlinear Control, EarlyView., 2023
Abstract In this paper, we study collective decision‐making in a multi‐population framework, where groups of individuals represent whole populations that interact by means of a regular network. Each group consists of a number of players and every player can choose between two options.
Wouter Baar, Leonardo Stella, Dario Bauso   +2 more
wiley   +1 more source

Necessary condition for the existence of a simple closed geodesic on a regular tetrahedron in the spherical space

Доповiдi Нацiональної академiї наук України
In the spherical space the curvature of the tetrahedron’s faces equals 1, and the curvature of the whole tetrahedron is concentrated into its vertices and faces. The intrinsic geometry of this tetrahedron depends on the value α of faces angle, where π/3 <
D.D. Sukhorebska
doaj   +1 more source

Conformal and Geodesic Mappings onto Some Special Spaces

Mathematics, 2019
In this paper, we consider conformal mappings of Riemannian spaces onto Ricci-2-symmetric Riemannian spaces and geodesic mappings of spaces with affine connections onto Ricci-2-symmetric spaces.
Volodymyr Berezovski, Yevhen Cherevko, Lenka Rýparová   +2 more
doaj   +1 more source

Closed Locally Minimal Networks on the Surfaces of Convex Polyhedra

Моделирование и анализ информационных систем, 2013
Closed locally minimal networks can be viewed as “branching” closed geodesics. We study such networks on the surfaces of convex polyhedra and discuss the problem of describing the set of all convex polyhedra that have such networks.
N. P. Strelkova
doaj   +3 more sources

Geodesic Mappings of V_n(K)-Spaces and Concircular Vector Fields

Mathematics, 2019
In the present paper, we study geodesic mappings of special pseudo-Riemannian manifolds called V n ( K ) -spaces. We prove that the set of solutions of the system of equations of geodesic mappings on V n ( K ) -spaces forms a ...
Igor G. Shandra, Josef Mikeš
doaj   +1 more source

Short closed geodesics with self-intersections [PDF]

Mathematical Proceedings of the Cambridge Philosophical Society, 2020
AbstractOur main point of focus is the set of closed geodesics on hyperbolic surfaces. For any fixed integer k, we are interested in the set of all closed geodesics with at least k (but possibly more) self-intersections. Among these, we consider those of minimal length and investigate their self-intersection numbers.
Erlandsson, Viveka, Parlier, Hugo
openaire   +7 more sources

Solutions to the direct and inverse navigation problems on the great ellipse

Journal of Geodetic Science, 2012
The Great Ellipse (GE) is the curve of intersection between the surface and a plane through the center of an ellipsoid. For arcs within a few thousands of kilometres it agrees within a few metres with the geodesic.
Sjöberg L. E.
doaj   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

Advanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh, PeiYu Cai, Elton J. G. Santos   +2 more
wiley   +1 more source

Explicit Geodesic Projection Distance on the Statistical Manifold of Multivariate Elliptical Distributions

Entropy
Geodesic projection distances on statistical manifolds have been widely applied across various research fields. Nevertheless, the existing closed-form solution is only available for the Gaussian manifold.
Xiangbing Chen, Yingying Wang, Jihong Xiao   +2 more
doaj   +1 more source

On Canonical Almost Geodesic Mappings of Type π₂(e)

Mathematics, 2020
In the paper, we consider canonical almost geodesic mappings of type π 2 ( e ) . We have found the conditions that must be satisfied for the mappings to preserve the Riemann tensor.
Volodymyr Berezovski, Josef Mikeš, Lenka Rýparová, Almazbek Sabykanov   +3 more
doaj   +1 more source