Results 21 to 30 of about 185,528 (178)
Acta et Commentationes: Ştiinţe Exacte şi ale Naturii, 2019 The Lotka-Volterra cubicdifferential systems with (1:-2)-singularity possessing invariant straight lines of two direction and total multiplicity six are classified.
Silvia TURUTA
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Cubic differential systems with 2-invariant straight lines [PDF]
Creative Mathematics and Informatics, 2013 For cubic differential system with a singular point O(0, 0) of a center or a focus type having three invariant straight lines of which one is 2-invariant it is proved that the origin is a center if and only if the first five Lyapunov quantities vanish.
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Gauge-invariant approach to quark dynamics [PDF]
, 2015 The main aspects of a gauge-invariant approach to the description of quark dynamics in the nonperturbative regime of QCD are first reviewed. In particular, the role of the parallel transport operation in constructing gauge-invariant Green's functions is ...
Sazdjian, H.
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MEASURING IN IMAGES WITH PROJECTIVE GEOMETRY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018 There is a fundamental relationship between projective geometry and the perspective imaging geometry of a pinhole camera. Projective scales have been used to measure within images from the beginnings of photogrammetry, mostly the cross-ratio on a ...
B. Erdnüß, B. Erdnüß
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Optical beams with an infinite number of vortices
Компьютерная оптика, 2021 In optical data transmission with using vortex laser beams, data can be encoded by the topo-logical charge, which is theoretically unlimited. However, the topological charge of a single sepa-rate vortex is limited by possibilities of its generating ...
V.V. Kotlyar
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A Novel Calibration Method of Line Structured Light Plane Using Spatial Geometry
Sensors, 2023 The line structured light plane calibration method using a plane target cannot produce satisfactory calibration results due to inaccurate positioning of the calibrated points. Field of view noise and sensor noise affect the target light stripe extraction
Huiping Gao, Guili Xu, Zhongchen Ma
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Aspects of Duality and Confining Strings [PDF]
, 1999 We inspect the excitation energy spectrum of a confining string in terms of solitons in an effective field theory model. The spectrum can be characterized by a spectral function, and twisting and bending of the string is manifested by the invariance of ...
Antti J. Niemi +4 more
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Acta et Commentationes: Ştiinţe Exacte şi ale NaturiiIn this paper the quartic differential systems with a center-focus critical point and non-degenerate infinity are examined. We show that in this family the maximal multiplicity of an affine invariant straight line is six. Modulo the affine transformation
Olga Vacaraș
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The Invariant Measures of some Infinite Interval Exchange Maps
, 2015 We classify the locally finite ergodic invariant measures of certain infinite interval exchange transformations (IETs). These transformations naturally arise from return maps of the straight-line flow on certain translation surfaces, and the study of the
Cheung +9 more
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Image Analysis and Stereology, 2011 The tessellation studied here is motivated by some stereological applications of a new expression for the motion invariant density of straight lines in R3.
Luis M Cruz-Orive
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