Results 11 to 20 of about 253,345 (276)

Affine convex body semigroups [PDF]

open access: yesSemigroup Forum, 2012
In this paper we present a new kind of semigroups called convex body semigroups which are generated by convex bodies of R^k. They generalize to arbitrary dimension the concept of proportionally modular numerical semigroup of [7].
A. Sánchez-R.-Navarro   +10 more
core   +4 more sources

Bounding Regions to Plane Steepest Descent Curves of Quasiconvex Families [PDF]

open access: yesJournal of Applied Mathematics, 2016
Two-dimensional steepest descent curves (SDC) for a quasiconvex family are considered; the problem of their extensions (with constraints) outside of a convex body K is studied.
Marco Longinetti   +2 more
doaj   +5 more sources

Convex hull estimation of mammalian body segment parameters

open access: yesRoyal Society Open Science, 2021
Obtaining accurate values for body segment parameters (BSPs) is fundamental in many biomechanical studies, particularly for gait analysis. Convex hulling, where the smallest-possible convex object that surrounds a set of points is calculated, has been ...
Samuel J. Coatham   +2 more
doaj   +3 more sources

Fiber Convex Bodies

open access: yesDiscrete & Computational Geometry, 2022
AbstractIn this paper we study the fiber bodies, that is the extension of the notion of fiber polytopes for more general convex bodies. After giving an overview of the properties of the fiber bodies, we focus on three particular classes of convex bodies. First we describe the strict convexity of the fiber bodies of the so called puffed polytopes.
Léo Mathis, Chiara Meroni
openaire   +4 more sources

Quantum algorithms and lower bounds for convex optimization [PDF]

open access: yesQuantum, 2020
While recent work suggests that quantum computers can speed up the solution of semidefinite programs, little is known about the quantum complexity of more general convex optimization.
Shouvanik Chakrabarti   +3 more
doaj   +1 more source

Existence of Gauss John ellipsoid operator problem [PDF]

open access: yesITM Web of Conferences, 2022
There is a common example in convex geometry and Banach space geometry: the unique ellipsoid with the largest volume associated with each symmetric convex body K is called John ellipsoid.
Yu Li’ao, Zou Du
doaj   +1 more source

Numerical Investigation of Liquid Flow Behaviors through Closed Rough Fractures in the Self-Propped Shale Formation

open access: yesEnergies, 2022
The surface morphology of fractures formed by hydraulic fracturing is usually rough. The roughness of the fracture surface is the main reason the actual fracture conductivity deviates from the ideal flat plate model result.
Qiqi Wang, Mian Chen, Jiaxin Lv
doaj   +1 more source

THE CONVEX INTERSECTION BODY OF A CONVEX BODY [PDF]

open access: yesGlasgow Mathematical Journal, 2011
AbstractLet L be a convex body in n and z an interior point of L. We associate with L and z a new, convex and centrally symmetric, body CI(L, z). This generalizes the classical intersection bodyI(L, z) (whose radial function at u ∈ Sn−1 is the volume of the hyperplane section of L through z, orthogonal to u). CI(L, z) coincides with I(L, z) if and only
Meyer, Mathieu, Reisner, Shlomo
openaire   +2 more sources

Scaling of convex hull volume to body mass in modern primates, non-primate mammals and birds. [PDF]

open access: yesPLoS ONE, 2014
The volumetric method of 'convex hulling' has recently been put forward as a mass prediction technique for fossil vertebrates. Convex hulling involves the calculation of minimum convex hull volumes (vol(CH)) from the complete mounted skeletons of modern ...
Charlotte A Brassey, William I Sellers
doaj   +1 more source

Wireless Sensor Network-Based Rigid Body Localization for NLOS Parameter Estimation

open access: yesSensors, 2022
In wireless sensor network (WSN)-based rigid body localization (RBL) systems, the non-line-of-sight (NLOS) propagation of the wireless signals leads to severe performance deterioration.
Pengwu Wan   +3 more
doaj   +1 more source

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