Results 81 to 90 of about 3,863,707 (192)

An extension of min/max flow framework [PDF]

, 2009
In this paper, the min/max flow scheme for image restoration is revised. The novelty consists of the fol- 24 lowing three parts. The first is to analyze the reason of the speckle generation and then to modify the 25 original scheme.
Chua, Chin-seng, Yu, Hongchuan, Bennamoun, Mohammed   +2 more
core   +1 more source

Geodesic equations in black hole space-times with cosmological constant

, 2010
The physics of a gravitational field can be explored by studying the geodesic motion of test particles and light. Although the majority of gravitational effects can be discussed using approximations and numerics, a systematic study of all effects can ...
Hackmann, Eva
core  

On geodesics in the spaces of constrained curves

Differential Geometry and its Applications
In this work, we study the geodesics of the space of certain geometrically and physically motivated subspaces of the space of immersed curves endowed with a first order Sobolev metric. This includes elastic curves and also an extension of some results on planar concentric circles to surfaces. The work focuses on intrinsic and constructive approaches.
openaire   +2 more sources

On Pseudospherical Smarandache Curves in Minkowski 3-Space

Journal of Applied Mathematics, 2014
In this paper we define nonnull and null pseudospherical Smarandache curves according to the Sabban frame of a spacelike curve lying on pseudosphere in Minkowski 3-space. We obtain the geodesic curvature and the expressions for the Sabban frame’s vectors
Esra Betul Koc Ozturk, Ufuk Ozturk, Kazim Ilarslan, Emilija Nešović   +3 more
doaj   +1 more source

CEVA, MENELAUS AND STEWART THEOREMS FOR GEODESIC TRIANGLES ON THE HYPERBOLIC UNIT SPHERE

Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009
: In this study, we give Ceva, Menelaus and Stewart Theorems for geodesic triangles on the hyperbolic unit sphere . Keywords: Geodesic triangle, Lorentz space, timelike vector.
Mehmet ÖNDER
doaj  

Approximating the smallest $k$-enclosing geodesic disc in a simple polygon

Journal of Computational Geometry
We consider the problem of finding a geodesic disc of smallest radius containing at least $k$ points from a set of $n$ points in a simple polygon that has $m$ vertices, $r$ of which are reflex vertices. We refer to such a disc as a SKEG disc. We present
Prosenjit Bose, Anthony D'Angelo, Stephane Durocher   +2 more
doaj   +1 more source

Timelike surfaces with Bertrand geodesic curves in Minkowski 3–space

AIP Advances
Geodesic curves on a surface play an essential role in reasonable implementation. A curve on a surface is a geodesic curve if its principal normal vector is aligned with the surface normal. Using the Serret–Frenet frame, the timelike (TL) surfaces can be
A. A. Almoneef, R. A. Abdel-Baky
doaj   +1 more source

Geodesic Geometry of Black Holes [PDF]

, 2006
The study of geodesics is of intrinsic significance in the study of the geometry of space-time. In this thesis null, space-like and time-like geodesics are studied in the case of the space-times of Schwarzschild, Reissner-Nordstrouml;m and Kerr black ...
Slezakova, Gabriela
core  

Constructing a space from the geodesic equations

, 2019
Given a space with a metric tensor defined on it, it is easy to write down the system of geodesic equations on it by using the formula for the Christoffel symbols in terms of the metric coefficients.
E. Fredericks (8093240), F.M. Mahomed (8093243), E. Momoniat (8093246), A. Qadir (8093249)   +3 more
core   +1 more source

Geodesic ball packings in $\mathbf{H}^2\!\times\!\mathbf{R}$ space for generalized Coxeter space groups [PDF]

, 2012
After having investigated the geodesic ball packings in $\mathbf{S}^2\!\times\!\mathbf{R}$ space we consider the analogous problem in $\mathbf{H}^2\!\times\!\mathbf{R}$ space from among the eight Thurston geometries.
Szirmai, Jenő
core   +1 more source