Information Menu

Authors Guidelines

Copyright Policy

Editorial Workflow

Our Journals

vol1-2017-black
oma-cover
ODAM-cover
Ptolemy Journal of chemistry
EASL-cover
Trends in Clinical and Medical Sciences

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.

Latest Published Articles

Differential operators and Narayana numbers

ODAM-Vol. 3 (2020), Issue 1, pp. 37 – 40 Open Access Full-Text PDF
Jie Xiong, Qi Fang
Abstract: In this paper, we establish a connection between differential operators and Narayana numbers of both kinds, as well as a kind of numbers related to central binomial coefficients studied by Sulanke (Electron. J. Combin. 7 (2000), R40).
Read Full Article

Evaluation of convergent series by using finite parts

OMS-Vol. 4 (2020), Issue 1, pp. 98 – 109 Open Access Full-Text PDF
Ricardo Estrada
Abstract: We present a method to find the sum of a convergent series based on the computation of Hadamard finite part limits of partial sums. We give several illustrations, the main being the formulas for convergent series of the type \(\sum_{n=2}^{\infty}\frac{\left( -1\right) ^{n}\zeta\left( n,a\right) b^{n+k}}{n+k},\) where \(\zeta\left( s,a\right)\) is Hurwitz zeta function, \(\left\vert b\right\vert \leq\left\vert a\right\vert ,\) \(b\neq-a,\) and \(k\in\mathbb{N}.\)
Read Full Article

Existence result for a singular semipositone dynamic system on time scales

OMS-Vol. 4 (2020), Issue 1, pp. 86 – 97 Open Access Full-Text PDF
Arzu Denk Oguz, Fatma Serap Topal
Abstract: We concentrate on investigating the existence of positive solutions for the system of second order singular semipositone m-point boundary value problems in this article. We emphasize that the nonlinear term may take a negative value and be singular. By the properties of Green’s function and applying fixed point theorem in cones, existence results for positive solutions are obtained. Also, we provide an example to make our results clear and easy for readers to understand the existence result.
Read Full Article

Fractional integrals inequalities for exponentially \(m\)-convex functions

OMS-Vol. 4 (2020), Issue 1, pp. 78 – 85 Open Access Full-Text PDF
Sajid Mehmood, Ghulam Farid
Abstract: Fractional integral operators are very useful in mathematical analysis. This article investigates bounds of generalized fractional integral operators by exponentially \(m\)-convex functions. Furthermore, a Hadamard type inequality have been analyzed and, special cases of established results have been discussed.
Read Full Article

Risk evaluation in information systems using continuous and discrete distribution laws

EASL-Vol. 3 (2020), Issue 1, pp. 35 – 44 Open Access Full-Text PDF
Ajit Singh, Amrita Prakash
Abstract: The paper construct continuous and discrete distribution laws, used to assess risks in information systems. Generalized expressions for continuous distribution laws with maximum entropy are obtained. It is shown that, in the general case, the entropy also depends on the type of moments used to determine the numerical characteristics of the distribution law. Also, probabilistic model have been developed to analyze the sequence of independent trials with three outcomes. Expressions for their basic numerical characteristics are obtained, as well as for calculating the probabilities of occurrence of the corresponding events.
Read Full Article

On a hyper-singular equation

OMA-Vol. 4 (2020), Issue 1, pp. 8 – 10 Open Access Full-Text PDF
Alexander G. Ramm
Abstract: The equation \(v=v_0+\int_0^t(t-s)^{\lambda -1}v(s)ds\) is considered, \(\lambda\neq 0,-1,-2…\) and \(v_0\) is a smooth function rapidly decaying with all its derivatives. It is proved that the solution to this equation does exist, is unique and is smoother than the singular function \(t^{-\frac 5 4}\).
Read Full Article
BOOK-foundations-of-mathematical-analysis-and-semigroups-theory
BOOK - NULL CONTROLLABILITY OF DEGENERATE AND NON-DEGENERATE SINGULAR PARABOLIC