Results 31 to 40 of about 76,964 (244)

Design and analysis of a synthetic prediction market using dynamic convex sets

open access: yesResults in Control and Optimization, 2021
We present a synthetic prediction market whose agent purchase logic is defined using a sigmoid transformation of a convex semi-algebraic set defined in feature space. Asset prices are determined by a logarithmic scoring market rule.
Nishanth Nakshatri   +4 more
doaj   +1 more source

The classification of limits of 2n-cycle algebras

open access: yesIndiana University Mathematics Journal, 1999
We obtain a complete classification of the locally finite algebras and the operator algebras, given as algebraic inductive limits and Banach algebraic inductive limits respectively, of direct systems: A_1 contained in A_2 contained in A_3 and so on. Here the A_k are 2n-cycle algebras, where n is at least 3 and the inclusions are of rigid type.
Donsig, Allan P., Power, S. C.
openaire   +4 more sources

Sharp Bound of the Number of Zeros for a Liénard System with a Heteroclinic Loop

open access: yesDiscrete Dynamics in Nature and Society, 2021
In the presented paper, the Abelian integral Ih of a Liénard system is investigated, with a heteroclinic loop passing through a nilpotent saddle. By using a new algebraic criterion, we try to find the least upper bound of the number of limit cycles ...
Junning Cai, Minzhi Wei, Guoping Pang
doaj   +1 more source

Exotic topological order in fractal spin liquids [PDF]

open access: yes, 2013
We present a large class of three-dimensional spin models that possess topological order with stability against local perturbations, but are beyond description of topological quantum field theory. Conventional topological spin liquids, on a formal level,
Yoshida, Beni
core   +3 more sources

Global bifurcation analysis of a rational Holling system [PDF]

open access: yesКомпьютерные исследования и моделирование, 2017
In this paper, we consider a quartic family of planar vector fields corresponding to a rational Holling system which models the dynamics of the populations of predators and their prey in a given ecological or biomedical system and which is a variation on
Valery Aleksandrovich Gaiko
doaj   +1 more source

Evaluation of urban green spaces in Tabriz from 1976 to 2016 using satellite images and changes prediction with artificial neural networks [PDF]

open access: yesنشریه جغرافیا و برنامه‌ریزی, 2020
Introduction  In recent decades, research on land use/land cover change has become an important aspect of global change, or global warming studies, since land use/land cover change is a major factor for global change because of its interactions with ...
Akbar Rahimi
doaj   +1 more source

Explicit limit cycles of a class of Kolmogorov system

open access: yesUniversal Journal of Mathematics and Applications, 2018
A class of Kolmogorov differential system is introduced. It is shown that under suitable assumptions on degrees and parameters, algebraic limit cycles can occur. we propose an easy algorithm to test the existence of limit cycles and we give them explicit
Salah Benyoucef, Ahmed Bendjeddou
doaj   +1 more source

Speed Oscillations of a Vehicle Rolling on a Wavy Road

open access: yesApplied Sciences, 2021
Every driver knows that his car is slowing down or accelerating when driving up or down, respectively. The same happens on uneven roads with plastic wave deformations, e.g., in front of traffic lights or on nonpaved desert roads.
Walter V. Wedig
doaj   +1 more source

Enumeration of chord diagrams on many intervals and their non-orientable analogs [PDF]

open access: yes, 2015
Two types of connected chord diagrams with chord endpoints lying in a collection of ordered and oriented real segments are considered here: the real segments may contain additional bivalent vertices in one model but not in the other.
Alexeev, N. V.   +3 more
core   +3 more sources

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