Results 31 to 40 of about 350,084 (285)

Scatter Search Algorithm for a Waste Collection Problem in an Argentine Case Study

open access: yesUrban Science
Increasing urbanization and rising consumption rates are putting pressure on urban systems to efficiently manage Municipal Solid Waste (MSW). Waste collection, in particular, is one of the most challenging aspects of MSW management. Therefore, developing
Diego Rossit   +3 more
doaj   +1 more source

Estimates for capacities and traces of potentials

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1984
It is shown that “isoperimetric” inequalities, relating measures and capacities, hold for all sets in ℝn if they are valid for all balls. As a corollary, the necessary and sufficient conditions for the continuity of some imbeddings of M. Riesz and Bessel
V. G. Maz'ja, S. P. Preobrazenskii
doaj   +1 more source

Separating valid odd-cycle and odd-set inequalities for the multiple depot vehicle scheduling problem

open access: yesEURO Journal on Computational Optimization, 2013
We consider the multicommodity network flow formulation of the multiple depot vehicle scheduling problem (MDVSP) and investigate several strategies within a branch-and-cut framework for solving the MDVSP.
Mounira Groiez   +3 more
doaj   +1 more source

Exact methods for the longest induced cycle problem

open access: yesCroatian Operational Research Review
The longest induced (or chordless) cycle problem is a graph problem classified as NP-complete and involves the task of determining the largest possible subset of vertices within a graph in such a way that the induced subgraph forms a cycle.
Ahmad Turki Anaqreh   +2 more
doaj   +1 more source

Notes to G. Bennett’s problems

open access: yesJournal of Inequalities and Applications, 1997
G. Bennett showed, by elementary proof, that if p≤q then (1.1) holds, and the constant p/s is best possible; and if p≥q then (1.2) is valid. The reversed inequalities have remained open problems.
L. Leindler
doaj   +1 more source

Some results and examples concerning Whyburn spaces

open access: yesApplied General Topology, 2012
We prove some cardinal inequalities valid in the classes of Whyburn and hereditarily weakly Whyburn spaces and we construct examples of non-Whyburn and non-weakly Whyburn spaces to illustrate that some previously known results cannot be generalized.
Ofelia T. Alas   +2 more
doaj   +1 more source

Valid Inequalities and Convex Hulls for Multilinear Functions

open access: yesElectronic Notes in Discrete Mathematics, 2010
We study the convex hull of the bounded, nonconvex set of a product of n variables for any n ≥ 2. We seek to derive strong valid linear inequalities for this set, which we call M_n; this is motivated by the fact that many exact solvers for nonconvex problems use polyhedral relaxations so as to compute a lower bound via linear programming solvers.
Belotti, Pietro   +2 more
openaire   +2 more sources

A Polyhedral Study of the Static Probabilistic Lot-Sizing Problem

open access: yes, 2016
We study the polyhedral structure of the static probabilistic lot-sizing problem and propose valid inequalities that integrate information from the chance constraint and the binary setup variables. We prove that the proposed inequalities subsume existing
Kucukyavuz, Simge, Liu, Xiao
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

On the size of rotating black holes

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
Recently a sequence of inequalities relating the black hole horizon, photon sphere, shadow were proposed for spherically symmetric and static black holes, providing the upper bound for given mass.
Xing-Hui Feng, H. Lü
doaj   +1 more source

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