Results 11 to 20 of about 15,952 (266)
Point Sets with Small Integer Coordinates and No Large Convex Polygons [PDF]
Discrete & Computational Geometry, 2017 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Frank Duque +2 more
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The Spherical Harmonic Family of Beampatterns
Acoustics, 2022 The free space solution to the wave equation in spherical coordinates is well known as a separable product of functions. Re-examination of these functions, particularly the sums of spherical Bessel and harmonic functions, reveals behaviors which can ...
Kevin J. Parker, Miguel A. Alonso
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On the algebraic $K$-theory of the coordinate axes over the integers [PDF]
Homology, Homotopy and Applications, 2011 We show that K_{2i}(Z[x,y]/(xy),(x,y)) is free abelian of rank 1 and that K_{2i+1}(Z[x,y]/(xy),(x,y)) is finite of order (i!)^2. We also compute K_{2i+1}(Z[x,y]/(xy),(x,y)) in low degrees.
Angeltveit, Vigleik, Gerhardt, Teena
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A Special Mutation Operator in the Genetic Algorithm for Fixed Point Problems
Journal of Function Spaces, 2023 Over the past century, the fixed point theory has emerged as a very useful and efficient tool in the study of nonlinear problems. This study introduced a progressed genetic algorithm (GA) based on a particular mutation operator applying on a subdivided ...
Mohammad Jalali Varnamkhasti +1 more
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Packing problems on generalised regular grid: Levels of abstraction using integer linear programming
Graphical Models, 2023 Packing a designated set of shapes on a regular grid is an important class of operations research problems that has been intensively studied for more than six decades. Representing a d-dimensional discrete grid as Zd, we formalise the generalised regular
Hao Hua, Benjamin Dillenburger
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Generalized Chebyshev Polynomials
Discussiones Mathematicae - General Algebra and Applications, 2018 Let h(x) be a non constant polynomial with rational coefficients. Our aim is to introduce the h(x)-Chebyshev polynomials of the first and second kind Tn and Un. We show that they are in a ℚ-vectorial subspace En(x) of ℚ[x] of dimension n.
Abchiche Mourad, Belbachir Hacéne
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Accurate Computation of Periodic Regions' Centers in the General M-Set with Integer Index Number
Discrete Dynamics in Nature and Society, 2010 This paper presents two methods for accurately computing the periodic regions' centers. One method fits for the general M-sets with integer index number, the other fits for the general M-sets with negative integer index number.
Wang Xingyuan, He Yijie, Sun Yuanyuan
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Sequential Ambiguity Resolution Method for Poorly-Observed GNSS Data
Remote Sensing, 2021 Integer ambiguity resolution is required to obtain precise coordinates for the global navigation satellite system (GNSS). Poorly observed data cause unfixed integer ambiguity and reduce the coordinate accuracy.
Haiyang Li +3 more
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Theoretical study of vortex beam generation based on geometric coordinate transformation
Frontiers in Physics, 2022 By performing a conformal optical mapping of an input beam from Cartesian to log-polar coordinates, we propose a method to generate vortex beam. By tilting the incident beam, a phase gradient is attached and evolves into a vortex phase due to the optical
Yanke Li +5 more
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Lossless Geometry Compression Through Changing 3D Coordinates into 1D
International Journal of Advanced Robotic Systems, 2013 A method of lossless geometry compression on the coordinates of the vertexes for grid model is presented. First, the 3D coordinates are pre-processed to be transformed into a specific form. Then these 3D coordinates are changed into 1D data by making the
Yongkui Liu +4 more
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