Results 21 to 30 of about 623,025 (279)

Hexapods with Plane-Symmetric Self-Motions

open access: yesRobotics, 2018
A hexapod is a parallel manipulator where the platform is linked with the base by six legs, which are anchored via spherical joints. In general, such a mechanical device is rigid for fixed leg lengths, but, under particular conditions, it can perform a ...
Georg Nawratil
doaj   +1 more source

Complex Line Bundles over Simplicial Complexes and their Applications [PDF]

open access: yes, 2016
Discrete vector bundles are important in Physics and recently found remarkable applications in Computer Graphics. This article approaches discrete bundles from the viewpoint of Discrete Differential Geometry, including a complete classification of ...
C Kreft   +8 more
core   +3 more sources

Dimensional Lifting through the Generalized Gram–Schmidt Process

open access: yesEntropy, 2018
A new way of orthogonalizing ensembles of vectors by “lifting” them to higher dimensions is introduced. This method can potentially be utilized for solving quantum decision and computing problems.
Hans Havlicek, Karl Svozil
doaj   +1 more source

Interactions between Digital Geometry and Combinatorics on Words [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2011
We review some recent results in digital geometry obtained by using a combinatorics on words approach to discrete geometry. Motivated on the one hand by the well-known theory of Sturmian words which model conveniently discrete lines in the plane, and on ...
Srečko Brlek
doaj   +1 more source

On the computation of foldings [PDF]

open access: yesFME Transactions, 2017
The process of determining the development (or net) of a polyhedron or of a developable surface is called unfolding and has a unique result, apart from the placement of different components in the plane.
Stachel Hellmuth
doaj  

Euler-Poincare reduction for discrete field theories [PDF]

open access: yes, 2007
In this note, we develop a theory of Euler-Poincare reduction for discrete Lagrangian field theories. We introduce the concept of Euler-Poincare equations for discrete field theories, as well as a natural extension of the Moser-Veselov scheme, and show ...
Joris Vankerschaver   +3 more
core   +2 more sources

Residuation in orthomodular lattices

open access: yesTopological Algebra and its Applications, 2017
We show that every idempotent weakly divisible residuated lattice satisfying the double negation law can be transformed into an orthomodular lattice. The converse holds if adjointness is replaced by conditional adjointness.
Chajda Ivan, Länger Helmut
doaj   +1 more source

Discrete space-time geometry and skeleton conception of particle dynamics

open access: yes, 2011
It is shown that properties of a discrete space-time geometry distinguish from properties of the Riemannian space-time geometry. The discrete geometry is a physical geometry, which is described completely by the world function.
J.L. Synge   +7 more
core   +1 more source

Research about the number of D-points of -tiling in given ellipse

open access: yesJournal of Hebei University of Science and Technology, 2017
An Archimedean tiling is a tiling of the plane by one type of regular polygon or several types of regular polygons, and every vertex of the tiling has the same vertex characteristics.
Xianglin WEI, Weiqi WANG
doaj   +1 more source

Yaroslavl International Conference on Discrete Geometry (dedicated to the centenary of A. D. Alexandrov)

open access: yesМоделирование и анализ информационных систем, 2015
The Yaroslavl International Conference on Discrete Geometry dedicated to the centenary of A. D. Alexandrov was organized by the International B.N. Delaunay Laboratory "Discrete and Computational Geometry" and took place from August 13 to 18, 2012 at the ...
N. Dolbilin   +4 more
doaj   +3 more sources

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