Results 11 to 20 of about 3,227 (267)

On singularity confinement for the pentagram map [PDF]

Discrete Mathematics & Theoretical Computer Science, 2012
The pentagram map, introduced by R. Schwartz, is a birational map on the configuration space of polygons in the projective plane. We study the singularities of the iterates of the pentagram map.
Max Glick
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Global configurations of singularities for quadratic differential systems with exactly three finite singularities of total multiplicity four

Electronic Journal of Qualitative Theory of Differential Equations, 2015
In this article we obtain the geometric classification of singularities, finite and infinite, for the two subclasses of quadratic differential systems with total finite multiplicity $m_f=4$ possessing exactly three finite singularities, namely: systems ...
Joan Artés, Jaume Llibre, Dana Schlomiuk, Nicolae Vulpe   +3 more
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Architectural singularities of parallel mechanisms with prismatic joints due to special designs of platform shapes [PDF]

Mechanical Sciences, 2019
Singularity is an inherent property of robotic manipulators. A manipulator becomes singular when it gains or losses degrees of freedom at a particular configuration.
X. Wu, S. Bai
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Kinematics and Singularity Analysis of a 7-DOF Redundant Manipulator

Sensors, 2021
A new method of kinematic analysis and singularity analysis is proposed for a 7-DOF redundant manipulator with three consecutive parallel axes. First, the redundancy angle is described according to the self-motion characteristics of the manipulator, the ...
Xiaohua Shi, Yu Guo, Xuechan Chen, Ziming Chen, Zhiwei Yang   +4 more
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First integrals and phase portraits of planar polynomial differential cubic systems with invariant straight lines of total multiplicity eight

Electronic Journal of Qualitative Theory of Differential Equations, 2017
In the article [C. Bujac, J. Llibre, N. Vulpe, Qual. Theory Dyn. Syst. 15(2016), 327–348] for the family of cubic differential systems with the maximum number of invariant straight lines, i.e.
Cristina Bujac, Nicolae Vulpe
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Taming triangulation dependence of T 6/ℤ2 × ℤ2 resolutions

Journal of High Energy Physics, 2022
Resolutions of certain toroidal orbifolds, like T 6/ℤ2 × ℤ2, are far from unique, due to triangulation dependence of their resolved local singularities. This leads to an explosion of the number of topologically distinct smooth geometries associated to a ...
A. E. Faraggi, S. Groot Nibbelink, M. Hurtado Heredia   +2 more
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Unified Singularity Crossing of a 3-(rR)PS Metamorphic Parallel Mechanism through Dynamic Modeling

Machines, 2023
Metamorphic parallel mechanisms can change into multiple configurations with different motion types and mobility, which consequently yield different solutions of inverse dynamics when crossing singularity.
Latifah Nurahmi, Dongming Gan, Wega Tama Adi Setya   +2 more
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Classification of cubic differential systems with invariant straight lines of total multiplicity eight and two distinct infinite singularities

Electronic Journal of Qualitative Theory of Differential Equations, 2015
In this article we prove a classification theorem (Main theorem) of real planar cubic vector fields which possess two distinct infinite singularities (real or complex) and eight invariant straight lines, including the line at infinity and including ...
Cristina Bujac, Nicolae Vulpe
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Phase singularity annihilation in plasmonic nano-apertures via epsilon-near-zero metamaterials

APL Photonics, 2021
In this work, we performed an extensive theoretical and experimental study to unveil the underlying mechanisms related to the intensified transmittance in epsilon-near-zero (ENZ)-integrated plasmonic nano-apertures.
F. Ghasemzadeh, A. R. Rashed, H. Caglayan   +2 more
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S-matrix singularities and CFT correlation functions

Journal of High Energy Physics, 2017
In this note, we explore the correspondence between four-dimensional flat space S-matrix and two-dimensional CFT proposed by Pasterski et al. We demonstrate that the factorisation singularities of an n-point cubic diagram reproduces the AdS Witten ...
Carlos Cardona, Yu-tin Huang
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