Results 11 to 20 of about 35,567 (199)

A Novel Geometric Modeling and Calculation Method for Forward Displacement Analysis of 6-3 Stewart Platforms

open access: yesMathematics, 2021
A novel geometric modeling and calculation method for forward displacement analysis of the 6-3 Stewart platforms is proposed by using the conformal geometric algebra (CGA) framework.
Ganmin Zhu   +3 more
doaj   +1 more source

Lightlike infinity in GCA models of Spacetime [PDF]

open access: yes, 2004
This paper discusses a 7 dimensional conformal geometric algebra model for spacetime based on the notion that spacelike and timelike infinities are distinct.
  +21 more
core   +1 more source

Minimal unitary representation of 5d superconformal algebra F(4) and AdS6/CFT5 higher spin (super)-algebras

open access: yesNuclear Physics B, 2015
We study the minimal unitary representation (minrep) of SO(5,2), obtained by quantization of its geometric quasiconformal action, its deformations and supersymmetric extensions.
Sudarshan Fernando, Murat Günaydin
doaj   +1 more source

Vertex operator algebras and operads [PDF]

open access: yes, 1993
Vertex operator algebras are mathematically rigorous objects corresponding to chiral algebras in conformal field theory. Operads are mathematical devices to describe operations, that is, $n$-ary operations for all $n$ greater than or equal to $0$, not ...
AA Belavin   +12 more
core   +3 more sources

Invariants of Space Line Element Structure Based on Projective Geometric Algebra

open access: yesIEEE Access, 2020
Based on the theory of Conformal Geometric Algebra, this paper presents a geometric constraint structure consisting of seven straight lines on three adjacent planes and its projective invariants, which can be obtained from a single frame image. Comparing
Zhang Youzheng, Mui Yanping
doaj   +1 more source

Non-relativistic conformal symmetries and Newton-Cartan structures [PDF]

open access: yes, 2009
This article provides us with a unifying classification of the conformal infinitesimal symmetries of non-relativistic Newton-Cartan spacetime. The Lie algebras of non-relativistic conformal transformations are introduced via the Galilei structure.
Christian Duval   +3 more
core   +3 more sources

Geometric modular action for disjoint intervals and boundary conformal field theory [PDF]

open access: yes, 2009
In suitable states, the modular group of local algebras associated with unions of disjoint intervals in chiral conformal quantum field theory acts geometrically.
Buchholz D.   +6 more
core   +3 more sources

DOA estimation for conformal vector-sensor array using geometric algebra

open access: yesEURASIP Journal on Advances in Signal Processing, 2017
In this paper, the problem of direction of arrival (DOA) estimation is considered in the case of multiple polarized signals impinging on the conformal electromagnetic vector-sensor array (CVA).
Tianzhen Meng, Minjie Wu, Naichang Yuan
doaj   +1 more source

Applications of Conformal Geometric Algebra to Transmission Line Theory

open access: yesIEEE Access, 2017
In this paper, we present the application of a projective geometry tool known as conformal geometric algebra (CGA) to transmission line theory. Explicit relationships between the Smith Chart, Riemann Sphere, and CGA are developed to illustrate the ...
Alex Arsenovic
doaj   +1 more source

Carrollian and celestial spaces at infinity

open access: yesJournal of High Energy Physics, 2022
We show that the geometry of the asymptotic infinities of Minkowski spacetime (in d + 1 dimensions) is captured by homogeneous spaces of the Poincaré group: the blow-ups of spatial (Spi) and timelike (Ti) infinities in the sense of Ashtekar-Hansen and a ...
José Figueroa-O’Farrill   +3 more
doaj   +1 more source

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