Rapid publication: manuscripts are peer-reviewed and a first decision provided to authors approximately 20 days after submission; acceptance to publication is undertaken in 5 days.

Recognition of reviewers: reviewers who provide timely, thorough peer-review reports receive vouchers entitling them to a discount on the APC of their next publication in any SCIREA journal, in appreciation of the work done.

Latest Articles

Open Access

Partial Algebraic Systems of type (T_n ,(n))

Saofee Busaman

Abstract: In this paper, we define the set (CF_(T_n,(n))(X_n))^{A^s} of all n-ary C-formulas on the partial algebraic system A^s=(A;(f^A_i)_i in I,r^A) of type (T_n,(n)) and define the operation R^{n,A} on the set( (W^C_{T_n}(X_n))^{A^s}U(CF_(T_n,(n))(X_n))^{A^s}. After this definition we have a unitary Menger algebra ( ( (W [...] Read more.

Abstract PDF (3890 K) May 31, 2023 7 Downloads 65 Views DOI: 10.54647/mathematics110401

Open Access

Forecasting of Air Passengers using Singular Spectrum Analysis

Sisti Nadia Amalia, Zul Amry

Abstract: Air transportation is the most appropriate option for extremely vast distances, such as those between cities, provinces, and countries. While unpredictability, high volatility, and seasonality sometimes result in complex behavior in air passenger time series, this research applies the Singular Spectrum Analysis technique fo [...] Read more.

Abstract PDF (1356 K) May 4, 2023 16 Downloads 115 Views DOI: 10.54647/mathematics110393

Open Access

Unbiased estimators of two second-order moments of the covariance matrix

Xuanci Wang, Wei Yi, Bin Zhang

Abstract: The covariance matrix, employed for measuring the linear correlation between variables, plays a vital role in data analysis, such as statistical prediction and hypothesis testing. When the data dimension is high, the traditional sample covariance matrix is not an ideal estimator of the population covariance matrix anymore, [...] Read more.

Abstract PDF (452 K) February 9, 2023 10 Downloads 408 Views DOI: 10.54647/mathematics110384

Open Access

Kepler, Newton and Einstein

Christer Oscar Kiselman

Abstract: This essay describes orbits of particles passing near the sun, first according to Newton’s celestial mechanics and then according to Einstein’s general theory of relativity. Attempts to verify the latter by observing the deflection of light during total solar eclipses are mentioned. Confirmation also comes from mea- sureme [...] Read more.

Abstract PDF (11639 K) February 9, 2023 15 Downloads 254 Views DOI: 10.54647/mathematics110381

Open Access

The $p$-adic valuation of $C_n(l)=\prod_{k=1}^{n}\prod_{j=0}^{l}(2k+2j-1)$

Xing Zhu, Chuanze Niu

Abstract: The formula of the $p$-adic valuation of the sequence $C_n(l)=\prod_{k=1}^{n}\prod_{j=0}^{l}(2k+2j-1)$ is studied. It is proved that $C_n(l)$ is not a square if $l$ is even and $n\ge \max\{2l,\frac{3l+19}{5}\}$. It is proved also that there are many squares in the sequences $C_n(1)$ and $C_n(3)$, while there are no squares [...] Read more.

Abstract PDF (255 K) January 25, 2023 7 Downloads 339 Views DOI: 10.54647/mathematics110379

Open Access

On complex analysis and Riemann zeta-function

H.-Q.Liu

Abstract: Counterexamples are given to residue theorem of complex analysis. The functional equation of Riemann zeta-function is invalid. [...] Read more.

Abstract PDF (1201 K) December 11, 2022 8 Downloads 509 Views DOI: 10.54647/mathematics11372

Open Access

The Minimal Norm Least Squares Solutions for a Class of Matrix Equations

Jinrong Shen

Abstract: In this paper, the minimal norm least squares solution of matrix equations (AXC,BXD,AXD,BXC)=(E,F,G,H) is discussed, by using the projection theorem, the generalized singular value decomposition and the canonical correlation decomposition, the expression of the solution of this problem is obtained. [...] Read more.

Abstract PDF (210 K) December 11, 2022 9 Downloads 273 Views DOI: 10.54647/mathematics11371

Open Access

Stirling’s Formula: Generalization and Improvement

Hong-Quan LIU

Abstract: The famous Stirling’s formula is generalized and improved, by using the arguments of analytic number theory and mathematical analysis. [...] Read more.

Abstract PDF (741 K) December 4, 2022 12 Downloads 335 Views DOI: 10.54647/mathematics11183

Submit A Manuscript

Review Manuscripts

Join As An Editorial Member

Most Views

Article

Electroelastic Actuators for Nano- and Microdisplacement

by Sergey M. Afonin

SCIREA Journal of Physics

3057 Downloads 63184 Views

Article

Pi’s Second White Paper —Future and Development