PSR Press – Mission Statement

Ptolemy Scientific Research Press (PSR Press) is a highly regarded publisher of scientific literature dedicated to bringing the latest research and findings to a broader audience. With a focus on cutting-edge research and technology, Ptolemy Scientific Research Press offers a range of publications catering to professionals, researchers, and student’s needs. Whether looking for information on the latest breakthroughs in physics, biology, engineering, or computer science, you can trust Ptolemy Scientific Research Press to deliver insightful, accurate, and engaging content. With its commitment to quality, accessibility, and innovation, Ptolemy Scientific Research Press is an essential resource for anyone interested in science and technology.

Open Journal of Mathematical Science (OMS)

ISSN: 2523-0212 (online) 2616-4906 (Print)

Open Journal of Mathematical Analysis (OMA)

ISSN: 2616-8111 (online) 2616-8103 (Print)

Open Journal of Discrete Applied Mathematics (ODAM)

ISSN: 2617-9687 (online) 2617-9679 (Print)

Ptolemy Journal of Chemistry (PJC)

ISSN: 2618-0758 (online) 2618-074X (Print)

Engineering and Applied Science Letters (EASL)

ISSN: 2617-9709 (online) 2617-9695 (Print)

Trends in Clinical and Medical Sciences (TCMS)

ISSN: 2791-0814 (online) 2791-0806 (Print)

Our Journals

Open Journal of Mathematical Science (OMS)

ISSN: 2523-0212 (online) 2616-4906 (Print)

Open Journal of Mathematical Analysis (OMA)

ISSN: 2616-8111 (online) 2616-8103 (Print)

Open Journal of Discrete Applied Mathematics (ODAM)

ISSN: 2617-9687 (online) 2617-9679 (Print)

Ptolemy Journal of Chemistry (PJC)

ISSN: 2618-0758 (online) 2618-074X (Print)

Engineering and Applied Science Letters (EASL)

ISSN: 2617-9709 (online) 2617-9695 (Print)

Trends in Clinical and Medical Sciences (TCMS)

ISSN: 2791-0814 (online) 2791-0806 (Print)

Latest in Press

Author(s): Ibrahim Nagac1, Kenan Tas2
1Graduate Student, Department of Mathematics, Usak University, Turkey
2Department of Mathematics, Usak University, Turkey
Abstract:

In this article, we establish fixed point outcomes for mappings that are asymptotically regular within the context of \(b\)-metric spaces. These findings broaden and enhance the familiar outcomes found in existing literature. Additionally, we present corollaries to demonstrate that our results are more encompassing compared to the established findings in the literature.

Author(s): Yılmaz Yılmaz 1, Hacer Bozkurt2
1Department of Mathematics, Inonu University, 44280, Malatya, Turkiye
2Department of Mathematics, Batman University, 72100, Batman, Turkiye
Abstract:

Investigating the sequence spaces \(e_{p}^{r},\) \(0\leq p<\infty ,\) and \( e_{\infty }^{r}\), is the aim of this work, which is done with some consideration to [1] and [2]. Also, we put forward some elite features of these spaces in terms of their bounded linear operators. To be more specific, we provide a response to the following: which of these spaces contain the properties of the Approximation, the Dunford-Pettis, the Radon-Riesz, and the Hahn-Banach extensions. Our study also examines the rotundity and smoothness of these spaces.

Author(s): J.D. Bulnes1, M.A.I. Travassos2, D.A. Juraev3, G. Dias4, Lopez Bonilla5
1Department of Exact and Technological Sciences, Federal University of Amapa, Rod. J. Kubitschek, 68903-419, Macapa, AP, Brazil
2Department of Scientific Research, Innovation and Training of Scientific and Pedagogical Staff, University of Economics and Pedagogy, Karshi, 180100
3Department of Mathematics, Anand International College of Engineering, Near Kanota, Agra Road, Jaipur-303012, Rajasthan, India
4Colegiado de Matem\’atica, Universidade Federal do Amapa, Rod. J. Kubitschek, 68903-419, Macapa, AP, Brazil
5ESIME-Zacatenco, Instituto Politecnico Nacional, Edif. 4, 1er. Piso, Col. Lindavista CP 07738, CDMX, Mexico
Abstract:

In this article, we present mathematical simulations of non-separable functions (those that would “correspond” to two entangled quantum particles) that lose this character only as a result of approaching the quantum-classical frontier. No mathematical representation of the action of deteriorating agents of quantum entanglement was included in the simulation. Such loss manifests itself both from the point of view of position space and momentum space. For certain limits, compatible with the space considered, the non-separable functions defined here transform into separable functions or cancel each other out at this boundary, thus erasing the (mathematical representation of) the quantum characteristic with no equivalent in the classical world. These simulations do not concern the loss of a physical property or characteristic, but rather the loss of a mathematical characteristic of a function for two quantum particles. The “ghostly action at a distance”, colloquially expressed by Prof. A. Einstein, has a “spatially limited and non-instantaneous action” as it’s opposite, which mathematically takes place in simulations of non-separable quantum functions, as shown here.

Author(s): Vishnu Paranganat1, Jan Rychta2, Dewey Taylor3
1Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
2Department of Mathematics and Applied Mathematics, Virginia Commonwealth University, Richmond, VA 23284, USA;
3Department of Mathematics and Applied Mathematics, Virginia Commonwealth University, Richmond, VA 23284, USA
Abstract:

When mathematical models of biological phenomena deal with an unknown parameter, it is often assumed that such a parameter follows a normal distribution. This introduces a symmetry assumption into the model. The purpose of this paper is to investigate and quantify the effect of asymmetry on model prediction. We introduce an asymmetry into a model of sexual conflict and toxin allocation by replacing a normal distribution by a shifted beta distribution. This way, we can naturally consider a large family of continuously changing distributions. We isolate the effect of skewness on the model prediction and demonstrate that in most cases, increasing skewness causes a slight increase in optimal toxicity allocation. We conclude that overall, the effect of the skewness is much smaller than the effect of the mean. In fact, for the particular model we studied, skewness does not seem to affect qualitative predictions.

Author(s): Abdelmajid Ali Dafallah1, Qiaozhen MA2, Eshag Mohamed Ahmed3
1Faculty of Petroleum and Hydrology Engineering, it Alsalam University, Almugled, Sudan
2Faculty of Mathematics and Informatics, it Northwest Normal University, Lanzhou 730070, P.R. China
3Faculty of Pure and Applied Sciences, International University of Africa, Khartoum, Sudan
Abstract:

In this paper, the study identified existence regularity of a random attractor for the stochastic dynamical system generated by non-autonomous strongly damping wave equation with linear memory and additive noise defined on \(\mathbb{R}^{n}\). First, to prove the existence of the pullback absorbing set and the pullback asymptotic compactness of the cocycle in a certain parameter region by using tail estimates and the decomposition technique of solutions. Then it proved the existence and uniqueness of a random attractor.

Author(s): Haidar Ali1, Barya Iftikhar1, Syed Asjad Naqvi2, Urooj Fatima1
1Department of Mathematics, Riphah International University, Faisalabad, Pakistan
2Department of Mathematics and Statistics, University of Agriculture, Faisalabad, Pakistan
Abstract:

Chemical graph theory, a branch of graph theory, uses molecular graphs for its representation. In QSAR/QSPR studies, topological indices are employed to evaluate the bioactivity of chemicals. Degree-based entropy, derived from Shannon’s entropy, is a functional statistic influenced by the graph and the probability distribution of its vertex set, with informational graphs forming the basis of entropy concepts. Planar octahedron networks have diverse applications in pharmacy hardware and system management. This article explores the Benzenoid Planar Octahedron Network (\(BPOH(n)\)), Benzenoid Dominating Planar Octahedron Network (BDPOH(n)), and Benzenoid Hex Planar Octahedron Network (\(BHPOH(n)\)). We compute degree-based entropies, including Randić entropy, atom bond connectivity (ABC), and geometric arithmetic (GA) entropy, for the Benzenoid planar octahedron network.

Author(s): Vladimir Pletser1,2
1lnstitut d’Astronomie et de Geophysique G.Lemaitre, Catholic University of Louvain, Louvain-la-Neuve, Belgium
2Blue Abyss, Newquay, Cornwall, United Kingdom
Abstract:

We study analytical solutions of a bi-dimensional low-mass gaseous disc slowly rotating around a central mass and submitted to small radial periodic perturbations. Hydrodynamics equations are solved for the equilibrium and perturbed configurations. A wave-like equation for the gas-perturbed specific mass is deduced and solved analytically for several cases of exponents of the power law distributions of the unperturbed specific mass and sound speed. It is found that, first, the gas perturbed specific mass displays exponentially spaced maxima, corresponding to zeros of the radial perturbed velocity; second, the distance ratio of successive maxima of the perturbed specific mass is a constant depending on disc characteristics and, following the model, also on the perturbation’s frequency; and, third, inward and outward gas flows are induced from zones of minima toward zones of maxima of perturbed specific mass, leading eventually to the possible formation of gaseous annular structures in the disc. The results presented may be applied in various astrophysical contexts to slowly rotating thin gaseous discs of negligible relative mass, submitted to small radial periodic perturbations.

Author(s): Ghulam Farid1, Josip Pečarić2
1Department of Mathematics, COMSATS University Islamabad, Attock Campus, Pakistan
2Croatian Academy of Sciences and Arts, Zagreb, Croatia
Abstract:

This paper aims to present Hermite-Hadamard type inequalities for a new class of functions, which will be denoted by \(Q_m^{h,g}(F;I)\) an and called class of quasi \(F-(h,g;m)\)-convex functions defined on interval \(I\). Many well known classes of functions can be recaptured from this new quasi convexity in particular cases. Also, several publish results are obtained along with new kinds of inequalities.

Author(s): Rasaki Olawale Olanrewaju1, Toyin Omoyeni Oguntola2, Lukman Abiodun Nafiu3, Sodiq Adejare Olanrewaju4
1Business Analytics Value Networks (BAVNs), Africa Business School (ABS), Mohammed VI Polytechnic University (UM6P), X4JH+QJR Avenue Mohamed Ben Abdellah Regragui, Rabat 10112, Morocco
2Ladoke Akintola University of Technology, Ogbomoso, Oyo State, Nigeria
3School of Graduates and Research at Metropolitan International University (MIU), Kampala, Uganda
4Department of Statistics, University of Ibadan, Ibadan, University of Ibadan, 900001, Oyo State, Nigeria
Abstract:

{In this article we studied and juxtaposed nonparametric Least Square and the Olanrewaju-Olanrewaju regression-type \({L_{(O – O){\lambda _{\gamma (\left| \theta \right|)}}}}\) kernels for supervised Support Vector Regressor (SVR) machine learning of hyperplane regression in a bivariate setting. The nonparametric kernels used to expound the SVR were Bisquare, Gaussian, Triweight, Uniform, Epanechnikov, and Triangular. Lagrangian multiplier estimation technique was adopted in estimating the involved SVR hyperplane regression coefficients as well as other embedded coefficients in each of the stated kernels. In addition, point estimate of the Euclidean distance (\(r\)) and error margin (\(d\)) in each of the SVR kernels were carved-out. In demonstration to the annual birthrate and its percentage change (\(\Delta \% \)) of the Nigeria populace from 1950 to 2023, the Olanrewaju-Olanrewaju regression-type kernel for SVR robustly outperformed the nonparametric and Least Square kernel-based SVRs with a miniature Cross-Validation index of -1205.49. 5.9% and 3.2% hyperplane estimated regression coefficients from the Olanrewaju-Olanrewaju kernel-based SVR were recorded for the annual birthrate and its percentage change (\(\Delta \% \)) respectively. Interpretably, this connotes that for every one percent increment in the annual birthrate per 1000, the mean rate of the Nigeria populace from 1950 to 2023 increased by 5.9% while other variables were held constant. Similarly, its percentage change per 1000 increased by 3.2% while other variables were held constant. In recommendation, the nonparametric and Olanrewaju-Olanrewaju regression-type SVRs as well as the Least Square SVR were pinpointed for future consideration of categorical, missing and zero bivariate observations.

For authors

Consider the prospect of contributing your latest original research or review article to a PSR Press journal, and become an integral part of our thriving community of esteemed authors. The journey with PSR Press offers unparalleled advantages: ...

For reviewers

Peer review at PSR Press is a thorough evaluation that goes beyond brief feedback, emphasizing constructive engagement. Though not strictly structured, we suggest the following format for reviewer reports: Summary, Identification of Major Issues, Addressing....

For editors

Have you considered becoming an editor for a PSR Press journal or wish to recommend a colleague for the Editorial Board? Contact the managing editor of the respective journal; we welcome your input. Editors form the nucleus of our journals, collaborating with international teams of experts in various research domains. These...

For subscribers and librarians

To support the sustainability and continued operation of PSR Press, a nominal fee is charged for subscriptions. To get access of contents published by PSR Press journals, the readers need to subscribe the respective journal by paying subscription fee. The subscription prices for one journal of PSR Press are as follows: