Results 11 to 20 of about 71,302 (258)

Around the Tangent Cone Theorem [PDF]

open access: yes, 2016
A cornerstone of the theory of cohomology jump loci is the Tangent Cone theorem, which relates the behavior around the origin of the characteristic and resonance varieties of a space. We revisit this theorem, in both the algebraic setting provided by cdga models, and in the topological setting provided by fundamental groups and cohomology rings.
A. Dimca   +48 more
openaire   +3 more sources

On Certain Classes of Curve Singularities with Reduced Tangent Cone [PDF]

open access: yes, 1999
We study a class of rational curves with an ordinary singular point, which was introduced in [Geramita and Orecchia, Minimally Generating Ideals Defining Certain Tangent Cones, J. of Algebra 78, No. 1 (1982), 36 – 57].
DE PARIS, ALESSANDRO
core   +1 more source

A remark on the intersections of subanalytic leaves [PDF]

open access: yesOpuscula Mathematica, 2016
We discuss a new sufficient condition - weaker than the usual transversality condition - for the intersection of two subanalytic leaves to be smooth. It involves the tangent cone of the intersection and, as typically non-transversal, it is of interest in
Maciej P. Denkowski
doaj   +1 more source

Optimal control for a size-structured predator-prey model in a polluted environment [PDF]

open access: yesE3S Web of Conferences, 2021
In this paper, we deal with an optimal harvesting problem for a periodic predator-prey hybrid system dependent on size-structure in a polluted environment.
Zhang Tainian, Luo Zhixue
doaj   +1 more source

Tangent Cones and Quasi-Interiorly Tangent Cones to Multifunctions [PDF]

open access: yesTransactions of the American Mathematical Society, 1983
R. T. Rockafellar has proved a number of rules of subdifferential calculus for nonlocally lipschitzian real-valued functions by investigating the Clarke tangent cones to the epigraphs of such functions. Following these lines we study in this paper the tangent cones to the sum and the composition of two multifunctions.
openaire   +2 more sources

Robust Time-Difference-of-Arrival (TDOA) Localization Using Weighted Least Squares with Cone Tangent Plane Constraint

open access: yesSensors, 2018
Finding the position of a radiative source based on time-difference-of-arrival (TDOA) measurements from spatially separated receivers has been widely applied in sonar, radar, mobile communications and sensor networks.
Bonan Jin, Xiaosu Xu, Tao Zhang
doaj   +1 more source

Effect of Aged Nonlinear Resistive Field Grading Material on Electric Field Distribution of DC Cone Spacer

open access: yesEnergies, 2022
Nonlinear resistive field grading materials are widely used in the electrical and electronic applications, and are usually researched based on the initial nonlinear conductivity characteristics of synthetic materials.
Yongsen Han, Feng Yang, Chenguang Zhao
doaj   +1 more source

Arrhenius activation energy of tangent hyperbolic nanofluid over a cone with radiation absorption

open access: yesResults in Engineering, 2022
This study focuses on an incompressible non-Newtonian nanofluid in a 2-dimensional transient boundary layer through a cone. The Arrhenius activation energy and radiation absorption are both accounted for the non-Newtonian nanofluid model. The Runge-Kutta
G. Dharmaiah   +3 more
doaj   +1 more source

Singularity of Mean Curvature Flow of Lagrangian Submanifolds [PDF]

open access: yes, 2003
In this article we study the tangent cones at first time singularity of a Lagrangian mean curvature flow. If the initial compact submanifold is Lagrangian and almost calibrated by Re\Omega in a Calabi-Yau n-fold (M,\Omega), and T>0 is the first blow-up ...
Chen, Jingyi, Li, Jiayu
core   +1 more source

Plane section of cone and cylinder in computer geometry [PDF]

open access: yesFacta Universitatis. Series: Architecture and Civil Engineering, 2005
In this paper a mathematical apparatus for determination of plane section of cone and cylinder was formed. By using the descriptive geometric approach the contour lines of these quadrics were determined.
Obradović Ratko M., Milojević Zoran
doaj   +1 more source

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