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Mathematics, Volume 7, Issue 8

August 2019 - 108 articles

Cover Story: The problem of optimal box positioning is a problem of finding a position of a box with given edge lengths that maximizes the number of enclosed points of the given set (the figure illustrates a 3-dimensional example). In this paper the problem was proved to be NP-hard. View this paper.
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Articles (108)

  • Article
  • Open Access
3,142 Views
13 Pages

20 August 2019

In this article, we discuss new characterizations of Cohen-Macaulay bipartite edge ideals. For arbitrary bipartite edge ideals I ( G ) , we also discuss methods to recognize regular elements on I ( G ) s for all s ≥ 1 in...

  • Article
  • Open Access
14 Citations
3,247 Views
16 Pages

20 August 2019

In this paper, we introduce the various types of generalized invexities, i.e., α f -invex/ α f -pseudoinvex and ( G , α f ) -bonvex/ ( G , α f ) -pseudobonvex functions. Furthermore, we construct nontrivial numerical exa...

  • Article
  • Open Access
8 Citations
2,740 Views
12 Pages

On Stability of Iterative Sequences with Error

  • Salwa Salman Abed and
  • Noor Saddam Taresh

20 August 2019

Iterative methods were employed to obtain solutions of linear and non-linear systems of equations, solutions of differential equations, and roots of equations. In this paper, it was proved that s-iteration with error and Picard–Mann iteration w...

  • Article
  • Open Access
29 Citations
3,849 Views
22 Pages

20 August 2019

The aims of this study are to propose the linguistic picture fuzzy Dombi (LPFD) aggregation operators and decision-making approach to deal with uncertainties in the form of linguistic picture fuzzy sets. LPFD operators have more flexibility due to th...

  • Article
  • Open Access
13 Citations
2,932 Views
10 Pages

19 August 2019

This paper analyzes the nonlocal elliptic system involving the p(x)-biharmonic operator. We give the corresponding variational structure of the problem, and then by means of Ricceri’s Variational theorem and the definition of general Lebesgue-S...

  • Article
  • Open Access
29 Citations
5,250 Views
15 Pages

19 August 2019

In this effort we propose a data-driven learning framework for reduced order modeling of fluid dynamics. Designing accurate and efficient reduced order models for nonlinear fluid dynamic problems is challenging for many practical engineering applicat...

  • Article
  • Open Access
17 Citations
3,510 Views
8 Pages

Neutrosophic Quadruple Vector Spaces and Their Properties

  • Vasantha Kandasamy W.B.,
  • Ilanthenral Kandasamy and
  • Florentin Smarandache

19 August 2019

In this paper authors for the first time introduce the concept of Neutrosophic Quadruple (NQ) vector spaces and Neutrosophic Quadruple linear algebras and study their properties. Most of the properties of vector spaces are true in case of Neutrosophi...

  • Feature Paper
  • Article
  • Open Access
172 Citations
6,019 Views
23 Pages

Hybrid Control Scheme for Projective Lag Synchronization of Riemann–Liouville Sense Fractional Order Memristive BAM NeuralNetworks with Mixed Delays

  • Grienggrai Rajchakit,
  • Anbalagan Pratap,
  • Ramachandran Raja,
  • Jinde Cao,
  • Jehad Alzabut and
  • Chuangxia Huang

19 August 2019

This sequel is concerned with the analysis of projective lag synchronization of Riemann–Liouville sense fractional order memristive BAM neural networks (FOMBNNs) with mixed time delays via hybrid controller. Firstly, a new type of hybrid control sche...

  • Article
  • Open Access
20 Citations
9,023 Views
14 Pages

19 August 2019

Since financial engineering problems are of great importance in the academic community, effective methods are still needed to analyze these models. Therefore, this article focuses mainly on capturing the discrete behavior of linear and nonlinear Blac...

  • Feature Paper
  • Article
  • Open Access
17 Citations
3,530 Views
22 Pages

19 August 2019

This study focuses on the stochastic differential calculus of Itô, as an effective tool for the analysis of noise in forest growth and yield modeling. Idea of modeling state (tree size) variable in terms of univariate stochastic differential eq...

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Mathematics - ISSN 2227-7390