Results 11 to 20 of about 22,165 (265)
About the torsion tensor of an affine connection on two-dimensional and three-dimensional manifolds
Дифференциальная геометрия многообразий фигур, 2021 The basis for this study of affine connections in linear frame bundle over a smooth manifold is the structure equations of the bundle. An affine connection is given in this bundle by the Laptev — Lumiste method. The differential equations are written for
K.V. Polyakova
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Confinement-induced columnar crystals of ellipses
Physical Review Research, 2021 Densest-packed structures of identical ellipses within a parallel strip have been obtained through Monte Carlo simulations and analytic derivations. Each of such structures is an affine transformation of a particular densest-packed structure of identical
Weiwei Jin (金炜炜) +3 more
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Carrollian and celestial spaces at infinity
Journal 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
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Affine and Projective Structure from Motion [PDF]
Procedings of the British Machine Vision Conference 1992, 1992 We demonstrate the recovery of 3D structure from multiple images, without attempting to determine the motion between views. The structure is recovered up to a transformation by a 3D linear group — the affine and projective group. The recovery does not require knowledge of camera intrinsic parameters or camera motion.
Demey, S, Zisserman, A, Beardsley, P
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Noncomplete affine structures on Lie algebras of maximal class
International Journal of Mathematics and Mathematical Sciences, 2002 Every affine structure on Lie algebra 𝔤 defines a representation of 𝔤 in aff(ℝn). If 𝔤 is a nilpotent Lie algebra provided with a complete affine structure then the corresponding representation is nilpotent.
E. Remm, Michel Goze
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Point matching based on affine invariant centroid trees
EURASIP Journal on Advances in Signal Processing, 2022 Object detection can be formulated as a point matching problem when objects are modeled by point sets. Moments, which have been widely used for point matching, are limited to affine transformations as their support point sets cannot keep invariant.
Wei Wang +4 more
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On transversely holomorphic foliations with homogeneous transverse structure
Pracì Mìžnarodnogo Geometričnogo Centru, 2023 In this paper we study transversely holomorphic foliations of complex codimension one with a transversely homogeneous complex transverse structure. We prove that the only cases are the transversely additive, affine and projective cases. We shall focus on
Bruno Cesar Azevedo Scardua +1 more
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X.—On the Structure and Affinities of the Platysomidæ [PDF]
Transactions of the Royal Society of Edinburgh, 1879 The genera, which I at present include under the family term Platysomidæ, are the following:—1. Eurynotus, Agassiz.2. Benedenius, Traquair.3. Mesolepis, Young.4. Eurysomus, Young.5. Wardichthys, Traquair.6. Cheirodus, M'Coy.7. Platysomus, Agassiz.
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Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications
EURASIP Journal on Audio, Speech, and Music Processing, 2007 In various adaptive estimation applications, such as acoustic echo cancellation within teleconferencing systems, the input signal is a highly correlated speech. This, in general, leads to extremely slow convergence of the NLMS adaptive FIR estimator.
Yan Wu Jennifer +3 more
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International Journal of Distributed Sensor Networks, 2022 The Fruit Fly Optimization Algorithm is a swarm intelligence algorithm with strong versatility and high computational efficiency. However, when faced with complex multi-peak problems, Fruit Fly Optimization Algorithm tends to converge prematurely.
Ru-Yu Wang +3 more
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