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The inverse k-max combinatorial optimization problem [PDF]

open access: yesYugoslav Journal of Operations Research, 2023
Classical combinatorial optimization concerns finding a feasible subset of a ground set in order to optimize an objective function. We address in this article the inverse optimization problem with the k-max function. In other words, we attempt to perturb
Nhan Tran Hoai Ngoc   +3 more
doaj   +1 more source

On Column-Convex and Convex Carlitz Polyominoes [PDF]

open access: yesMathematics in Computer Science, 2021
In this paper, we introduce and study {\it Carlitz polyominoes}. In particular, we show that, as $n$ grows to infinity, asymptotically the number of \begin{enumerate} \item column-convex Carlitz polyominoes with perimeter $2n$ is \beq \frac{9\sqrt{2}(14+3\sqrt{3})}{2704\sqrt{πn^3}}4^n.
Toufik Mansour   +2 more
openaire   +2 more sources

Triangulability of convex graphs and convex skewness [PDF]

open access: yesDiscrete Mathematics, Algorithms and Applications, 2021
Suppose [Formula: see text] is a subgraph of a convex complete graph [Formula: see text] and [Formula: see text] contains no boundary edge of [Formula: see text] and [Formula: see text]. We determine necessary and sufficient conditions on [Formula: see text] such that [Formula: see text] admits a triangulation.
Niran Abbas Ali   +3 more
openaire   +3 more sources

Experimental and Numerical Investigation of the Heat Transfer of Honeycomb-Structured Tubes

open access: yesThermo, 2023
Tube bundle recuperators are generally designed to operate with smooth tubes. Structured tubes can be used to increase the efficiency of recuperators. Compared to smooth tubes, the surface for heat transfer is increased and thus heat transfer is enhanced.
Eileen Trampe   +2 more
doaj   +1 more source

Some q-Fractional Estimates of Trapezoid like Inequalities Involving Raina’s Function

open access: yesFractal and Fractional, 2022
In this paper, we derive two new identities involving q-Riemann-Liouville fractional integrals. Using these identities, as auxiliary results, we derive some new q-fractional estimates of trapezoidal-like inequalities, essentially using the class of ...
Kamsing Nonlaopon   +4 more
doaj   +1 more source

An Adaptive Projection Gradient Method for Solving Nonlinear Fractional Programming

open access: yesFractal and Fractional, 2022
In this study, we focus on solving the nonlinear fractional optimization problem in which the numerator is smooth convex and the denominator is smooth concave.
Mootta Prangprakhon   +2 more
doaj   +1 more source

Negative Mood States Are Related to the Characteristics of Facial Expression Drawing: A Cross-Sectional Study

open access: yesFrontiers in Psychology, 2020
An assessment of mood or emotion is important in developing mental health measures, and facial expressions are strongly related to mood or emotion. This study thus aimed to examine the relationship between levels of negative mood and characteristics of ...
Chika Nanayama Tanaka   +6 more
doaj   +1 more source

A convex polynomial that is not sos-convex [PDF]

open access: yesMathematical Programming, 2011
15 ...
Amir Ali Ahmadi, Pablo A. Parrilo
openaire   +2 more sources

Advances in Ostrowski-Mercer Like Inequalities within Fractal Space

open access: yesFractal and Fractional, 2023
The main idea of the current investigation is to explore some new aspects of Ostrowski’s type integral inequalities implementing the generalized Jensen–Mercer inequality established for generalized s-convexity in fractal space.
Miguel Vivas-Cortez   +4 more
doaj   +1 more source

Terracini convexity [PDF]

open access: yesMathematical Programming, 2022
AbstractWe present a generalization of the notion of neighborliness to non-polyhedral convex cones. Although a definition of neighborliness is available in the non-polyhedral case in the literature, it is fairly restrictive as it requires all the low-dimensional faces to be polyhedral.
James Saunderson, Venkat Chandrasekaran
openaire   +4 more sources

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