## WSEAS Transactions on Mathematics

## Volume 20, 2021

Lionel Garnier, Lucie Druoton, Jean-Paul Bécar, Laurent Fuchs, Géraldine Morin,

"Subdivisions of Horned or Spindle Dupin Cyclides Using Bézier Curves with Mass Points", WSEAS Transactions on Mathematics, vol. 20, pp. 756-776, 2021Mustapha Elhassani, Abdelhakim Chillali, Ali Mouhib,

"A Heuristic Method to Approximate the Closest Vector Problem", WSEAS Transactions on Mathematics, vol. 20, pp. 745-755, 2021Olawale J. Adeleke, Idowu A. Osinuga, Raufu A. Raji,

"A Globally Convergent Hybrid FR-PRP Conjugate Gradient Method for Unconstrained Optimization Problems", WSEAS Transactions on Mathematics, vol. 20, pp. 736-744, 2021Hassan Al-Zoubi, Farhan Abdel-Fattah, Mutaz Al-Sabbagh,

"Surfaces of Finite III-type in the Euclidean 3-Space", WSEAS Transactions on Mathematics, vol. 20, pp. 729-735, 2021Boris M. Shumilov,

"Construction of an Effective Preconditioner for the Even-odd Splitting of Cubic Spline Wavelets", WSEAS Transactions on Mathematics, vol. 20, pp. 717-728, 2021Zainab Mohammed Alwan,

"Solution Non Linear Partial Differential Equations By ZMA Decomposition Method", WSEAS Transactions on Mathematics, vol. 20, pp. 712-716, 2021Amarjit Kaur Sahni, Jayanti Tripathi Pandey, Ratnesh Kumar Mishra, Vinay Kumar,

"On Fuzzy Proper Exact Sequences and Fuzzy Projective Semimodules Over Semirings", WSEAS Transactions on Mathematics, vol. 20, pp. 700-711, 2021Wala’a Alkasasbeh, Malik Bataineh,

"Generalizations of S- Prime Ideals", WSEAS Transactions on Mathematics, vol. 20, pp. 694-699, 2021Henny Pramoedyo, Novi Nur Aini, Sativandi Riza, Danang Ariyanto,

"Prediction of Soil Particle Size Fraction using Geographically Weighted Regression and Random Forest", WSEAS Transactions on Mathematics, vol. 20, pp. 683-693, 2021Andres Morocho Caiza, Erik F. Mendez Garces, Gabriela Mafla, Joseph Guerra, Williams Villalba,

"Identification of Dynamical Systems Through the Structure of Auto-regression With Exogenous Variable by Decreasing Gradient and Least Squares", WSEAS Transactions on Mathematics, vol. 20, pp. 676-682, 2021Solimun, Adji Achmad Rinaldo Fernandes, Intan Rahmawati, Lailil Muflikhah, Farid Ubaidillah, Alifya Al Rohimi,

"Research on Structural Flexibility and Acceptance Model (SFAM) Reconstruction Based on Disruption Innovation in the Social Humanities and Education Sector", WSEAS Transactions on Mathematics, vol. 20, pp. 657-675, 2021Eva Fadilah Ramadhani, Adji Achmad Rinaldo Fernandes, Ni Wayan Surya Wardhani,

"Comparison of Discriminant Analysis and Adaptive Boosting Classification and Regression Trees on Data with Unbalanced Class", WSEAS Transactions on Mathematics, vol. 20, pp. 650-656, 2021Solimun, Adji Achmad Rinaldo Fernandes, Nurjannah, Indah Yanti, Luthfatul Amaliana, Eva Fadilah Ramadhani, Fathiyatul Laili Nur Rasyidah,

"Reconstruction of Non-linear Path Analysis Accompanied by Measurement Models on Food Security Models in Indonesia Post-Covid19 Pandemic Based on Big Data", WSEAS Transactions on Mathematics, vol. 20, pp. 637-649, 2021S. R. Swamy, Alina Alb Lupaş, Abbas Kareem Wanas, J. Nirmala,

"Applications of Borel Distribution for a New Family
of Bi-Univalent Functions Defined by Horadam
Polynomials", WSEAS Transactions on Mathematics, vol. 20, pp. 630-636, 2021Ahmad Abu Rahma, Aliaa Burqan, Özen Özer,

"New Results for Arithmetic –Geometric Mean Inequalities and
Singular Values in Matrices", WSEAS Transactions on Mathematics, vol. 20, pp. 625-629, 2021Lanrewaju O. Adekola,

"Statistical Analysis of Cropland Area in Canada using the Autoregressive Hidden Markov Time Series Model", WSEAS Transactions on Mathematics, vol. 20, pp. 615-624, 2021Farrukh Jamal, Christophe Chesneau,

"The Moment Properties of Order, Reversed Order and Upper
Record Statistics for the Power Ailamujia Distribution", WSEAS Transactions on Mathematics, vol. 20, pp. 607-614, 2021Hafed M. Motair,

"Hybridization Simulated Annealing Algorithm in a Single Machine Scheduling Problem", WSEAS Transactions on Mathematics, vol. 20, pp. 598-606, 2021Lionel Garnier, Lucie Druoton, Jean-Paul Bécar, Laurent Fuchs, Géraldine Morin,

"Subdivisions of Ring Dupin Cyclides Using Bézier Curves with Mass Points", WSEAS Transactions on Mathematics, vol. 20, pp. 581-597, 2021Sinu N. Vijayan, Anjaly Kishore,

"C-graphs - A Mixed Graphical Representation of Groups ", WSEAS Transactions on Mathematics, vol. 20, pp. 569-580, 2021Eduin Rodríguez, Carlos Granados, Judith Bermúdez,

"A Generalized of Nörlund Ideal Convergent Double Sequence Spaces", WSEAS Transactions on Mathematics, vol. 20, pp. 562-568, 2021Timbang Sirait,

"Estimation of An Optimum Spatial Autocorrelation in Linear Mixed Models Containing Spatial Effects", WSEAS Transactions on Mathematics, vol. 20, pp. 554-561, 2021Alaa Melhem, Malik Bataineh, Rashid Abu-Dawwas,

"Characterizations of Graded Rings over Which Every Graded semi-primary Ideal is Graded 1-Absorbing Primary", WSEAS Transactions on Mathematics, vol. 20, pp. 547-553, 2021Gharib. M. Gharib, Rania Saadeh,

"Reduction of the Self-dual Yang-Mills Equations to Sinh-Poisson Equation and Exact Solutions", WSEAS Transactions on Mathematics, vol. 20, pp. 540-546, 2021Mohammad Alaroud, Yousef Al-Qudah,

"A Novel Attractive Algorithm for Handling Systems of Fractional Partial Differential Equations", WSEAS Transactions on Mathematics, vol. 20, pp. 524-539, 2021Chanokgan Sahatsathatsana, Sattra Sahatsathatsana,

"On Approximation of the Panjer Distribution by the Poisson and Binomial Distributions", WSEAS Transactions on Mathematics, vol. 20, pp. 520-523, 2021Anatoly Beletsky,

"An Effective Algorithm for the Synthesis of Irreducible Polynomials over a Galois Fields of Arbitrary Characteristics", WSEAS Transactions on Mathematics, vol. 20, pp. 508-519, 2021Alsauodi Maha, Alhorani Mohammed, Khalil Roshdi,

"Solutions of Certain Fractional Partial Differential Equations", WSEAS Transactions on Mathematics, vol. 20, pp. 504-507, 2021Jacob M. Manale,

"On the Unsolvable Quintic Equation x^{5}+ x

^{2}+ x + 1/π = 0", WSEAS Transactions on Mathematics, vol. 20, pp. 496-503, 2021

A. Yuri K. Dem’yanovich, Tatjana A. Safonova, Andrey N. Terekhov,

"Approximation Functionals and Their Application", WSEAS Transactions on Mathematics, vol. 20, pp. 489-495, 2021I.G. Burova, A.G. Doronina, D.E. Zhilin,

"Splines of the Fourth Order Approximation and the Volterra Integral Equations", WSEAS Transactions on Mathematics, vol. 20, pp. 475-488, 2021Walunyaporn Panate, Wichapon Chatthong, Warud Nakkhasen,

"A Note on Interior Bases of Semigroups", WSEAS Transactions on Mathematics, vol. 20, pp. 470-474, 2021Ahmed Bouchenak, Khalil Roshdi, Alhorani Mohammed,

"Fractional Fourier Series with Separation of Variables Technique and Its Application on Fractional differential Equations", WSEAS Transactions on Mathematics, vol. 20, pp. 461-469, 2021Khai Wah Khaw, Xin Ying Chew, Ming Ha Lee, Wai Chung Yeong, Sajal Saha,

"One-sided 4-out-of-5 Run Rules Charts for the Multivariate Coefficient of Variation in the Finite Horizon Process", WSEAS Transactions on Mathematics, vol. 20, pp. 455-460, 2021Chokchai Viriyapong, Nongluk Viriyapong,

"Modified Sumudu Decomposition Method for Solving Lane-Emden-Fowler Type Systems", WSEAS Transactions on Mathematics, vol. 20, pp. 446-454, 2021Nongluk Viriyapong, Chokchai Viriyapong,

"On the Diophantine Equation n^{x}+ 13

^{y}= z

^{2}where n = 2 (mod 39) and n + 1 is not a Square Number", WSEAS Transactions on Mathematics, vol. 20, pp. 442-445, 2021

Fabián Toledo Sánchez, Pedro Pablo Cárdenas Alzate, Carlos Arturo Escudero Salcedo,

"A note on the stability of a modified Lotka-Volterra model using Hurwitz polynomials", WSEAS Transactions on Mathematics, vol. 20, pp. 431-441, 2021Juthaphorn Sinsomboonthong, Saichon Sinsomboonthong,

"Weighted Maximum Likelihood Correlation Coefficient to Handle
Missing Values and Outliers in Data Set", WSEAS Transactions on Mathematics, vol. 20, pp. 415-430, 2021Diana Rubio, Domingo A. Tarzia, Guillermo F. Umbricht,

"Heat Transfer Process with Solid-solid Interface: Analytical and Numerical Solutions", WSEAS Transactions on Mathematics, vol. 20, pp. 404-414, 2021Mohammad Hassan Mudaber, Nor Haniza Sarmin, Ibrahim Gambo,

"Perfect Codes Over Induced Subgraphs of Unit Graphs of Ring of Integers Modulo n", WSEAS Transactions on Mathematics, vol. 20, pp. 399-403, 2021S.Y. Jamal, J.M. Manale,

"Solutions of the KdV Equation through Analysis of Regular Symmetries", WSEAS Transactions on Mathematics, vol. 20, pp. 387-398, 2021Faris M.Taweel, Eman A. Abuhijleh, Shorouq Ali,

"A Graceful Labeling of Square of Path Graph with Quadratic Complexity Algorithm", WSEAS Transactions on Mathematics, vol. 20, pp. 378-386, 2021Eman A. Abuhijleh, Mourad Massa’deh, Amani Sheimat, Abdulazeez Alkouri,

"Complex Fuzzy Groups Based on Rosenfeld’s Approach", WSEAS Transactions on Mathematics, vol. 20, pp. 368-377, 2021Yongcai Ren,

"Several Results on Conjugacy Class Sizes of Some Elements of Finite Groups", WSEAS Transactions on Mathematics, vol. 20, pp. 361-367, 2021José Sanabria, Osmin Ferrer, Clara Blanco,

"On nearly S-paracompactness", WSEAS Transactions on Mathematics, vol. 20, pp. 353-360, 2021Vusala Nuriyeva,

"The Necessary Conditions Imposed on the Coefficients of Multistep Hybrid Methods Adapted for Solving ODEs of the Second Order", WSEAS Transactions on Mathematics, vol. 20, pp. 344-352, 2021Prapart Pue-On,

"The Modified Sadik Decomposition Method to Solve a System of Nonlinear Fractional Volterra Integro-Differential Equations of Convolution type", WSEAS Transactions on Mathematics, vol. 20, pp. 335-343, 2021Refah Alotaibi, H. Rezk, Sanku Dey,

"MCMC Method for Exponentiated Lomax Distribution based on Accelerated Life Testing with Type I Censoring", WSEAS Transactions on Mathematics, vol. 20, pp. 319-334, 2021Duangkamon Kitkuan, Pakeeta Sukprasert,

"Set-valued Contractions in b-Metric Spaces with Application", WSEAS Transactions on Mathematics, vol. 20, pp. 312-318, 2021Junzhe Cai, Peter Z. Revesz,

"A Novel Spatiotemporal Method for Predicting Covid-19 Cases", WSEAS Transactions on Mathematics, vol. 20, pp. 300-311, 2021Refah Mohammed Alotaibi, Yogesh Mani Tripathi, Sanku Dey, Hoda Ragab Rezk,

"Estimation of Multicomponent Reliability based on Progressively Type II Censored Data from Unit Weibull Distribution", WSEAS Transactions on Mathematics, vol. 20, pp. 288-299, 2021Wipawee Tangjai, Chusak Chubthaisong,

"On the Diophantine equation 3^{x}+p

^{y}=z

^{2}where p ≡ 2 (mod 3) ", WSEAS Transactions on Mathematics, vol. 20, pp. 283-287, 2021

Nicholas Assimakis, Maria Adam,

"Closed Form Solutions of Lyapunov Equations using the Vech and Veck Operators", WSEAS Transactions on Mathematics, vol. 20, pp. 276-282, 2021Adirek Vajrapatkul,

"The Shock Reaction in a Simple Close Economy", WSEAS Transactions on Mathematics, vol. 20, pp. 264-275, 2021Amani Shatarah,

"Toeplitz Like Operators on 2-nuclear Tensor Product of Hardy Spaces", WSEAS Transactions on Mathematics, vol. 20, pp. 255-263, 2021Adnan A. Mustafa,

"Two Probabilistic Models for Quick Dissimilarity Detection of Big Binary Data", WSEAS Transactions on Mathematics, vol. 20, pp. 244-254, 2021Rashad A. Abdel-Baky, Fatemah Mofarreh,

"Sweeping Surface of Center Curve on Surface in Euclidean 3-space E³", WSEAS Transactions on Mathematics, vol. 20, pp. 235-243, 2021Faniran T. S., Bakare E. A., Potucek R., Ayoola E. O.,

"Global and Sensitivity Analyses of Unconcerned COVID-19 Cases in Nigeria: A Mathematical Modeling Approach", WSEAS Transactions on Mathematics, vol. 20, pp. 218-234, 2021M. Khalifa Saad, Abu Zaid Ansari, M. Akram, F. Alharbi,

"Spacelike Surfaces with a Common Line of Curvature in Lorentz-Minkowski 3-Space", WSEAS Transactions on Mathematics, vol. 20, pp. 207-217, 2021Daya K. Nagar, Edwin Zarrazola, Alejandro Roldán-Correa,

"Conditionally Specified Bivariate Kummer-Gamma Distribution", WSEAS Transactions on Mathematics, vol. 20, pp. 196-206, 2021Jorge Rodríguez Contreras, Alberto Reyes Linero, Bladimir Blanco Montes, Primitivo B. Acosta Humánez,

"Transcritical Bifurcations and Algebraic Aspects of Quadratic Multiparametric Families", WSEAS Transactions on Mathematics, vol. 20, pp. 186-195, 2021Radwan Abu-Gdairi, Ibrahim Noaman,

"Generating Fuzzy Sets and Fuzzy Relations based on Information", WSEAS Transactions on Mathematics, vol. 20, pp. 178-185, 2021Oleksandr Karelin, Anna Tarasenko,

"On Factorization of Functional Operators with Reflection on the Real Axis", WSEAS Transactions on Mathematics, vol. 20, pp. 171-177, 2021Krittidej Chanthawara, Sayan Kaennakham,

"A Hybrid Shapeless Radial Basis Function Applied with the Dual Reciprocity Boundary Element Method", WSEAS Transactions on Mathematics, vol. 20, pp. 159-170, 2021Eman Almuhur, Manal Al-Labadi,

"Pairwise Strongly Lindelöf, Pairwise Nearly, almost and Weakly Lindelöf Bitopological Spaces", WSEAS Transactions on Mathematics, vol. 20, pp. 152-158, 2021Osmin Ferrer, Luis Lazaro, Jorge Rodriguez,

"Successions of J-bessel in Spaces with Indefinite Metric", WSEAS Transactions on Mathematics, vol. 20, pp. 144-151, 2021A. S. Al-Moisheer, A. F. Daghestani, K. S. Sultan,

"Mixture of Lindley and Inverse Weibull Distributions: Properties and Estimation", WSEAS Transactions on Mathematics, vol. 20, pp. 134-143, 2021Sorrawee Roenganan, Masnita Misran, Nattakorn Phewchean,

"A Study of Life Internal Rate of Return", WSEAS Transactions on Mathematics, vol. 20, pp. 122-133, 2021Somphorn Arunsingkarat, Renato Costa, Masnita Misran, Nattakorn Phewchean,

"Option Pricing under GARCH Models Applied to the SET50 Index of Thailand", WSEAS Transactions on Mathematics, vol. 20, pp. 112-121, 2021Supitcha Mamuangbon, Kamon Budsaba, Andrei Volodin,

"The Performance of Estimators for Generalization of Crack Distribution", WSEAS Transactions on Mathematics, vol. 20, pp. 106-111, 2021A. A. Abdel-Salam, M. Khalifa Saad,

"Classification of Evolutoids and Pedaloids in Minkowski Space-time Plane", WSEAS Transactions on Mathematics, vol. 20, pp. 97-105, 2021Burkhan Kalimbetov, Valery Safonov,

"Singularly Perturbed Integro-Differential Equations with Rapidly Oscillating Coefficients and with Rapidly Changing Kernel in the Case of a Multiple Spectrum", WSEAS Transactions on Mathematics, vol. 20, pp. 84-96, 2021Robert Gieroba, Łukasz Kruk,

"Minimality of SRPT Networks with Resource Sharing", WSEAS Transactions on Mathematics, vol. 20, pp. 74-83, 2021Yu. K. Dem’yanovich,

"Approximation on Manifold", WSEAS Transactions on Mathematics, vol. 20, pp. 62-73, 2021Chanakan Sungboonchoo, Wararit Panichkitkosolkul, Andrei Volodin,

"Comparison of Accuracy Properties for Confidence Intervals of the Cross-Product Ratio of Binomial Proportions under Direct-Direct Sampling Scheme", WSEAS Transactions on Mathematics, vol. 20, pp. 53-61, 2021Lapasrada Singhasomboon, Wararit Panichkitkosolkul, Andrei Volodin,

"Confidence Intervals for the Ratio of Means of Two Independent Log-Normal Distributions", WSEAS Transactions on Mathematics, vol. 20, pp. 45-52, 2021Daya K. Nagar, Edwin Zarrazola, Yohana Tabares-Herrera,

"Doubly Non-Central Generalized Beta Distributions", WSEAS Transactions on Mathematics, vol. 20, pp. 37-44, 2021Nabilah Abughazalah, Majid Khan,

"An Efficient Information Hiding Mechanism based on Confusion Component over Local Ring and Moore-Penrose Pseudo Inverse", WSEAS Transactions on Mathematics, vol. 20, pp. 24-36, 2021I. G. Burova,

"Application Local Polynomial and Non-polynomial Splines of the Third Order of Approximation for the Construction of the Numerical Solution of the Volterra Integral Equation of the Second Kind", WSEAS Transactions on Mathematics, vol. 20, pp. 9-23, 2021Saeid Jafari, Abd El Fattah El-Atik, Raja M. Latif, M. K. El-Bably,

"Soft Topological Spaces Induced via Soft Relations", WSEAS Transactions on Mathematics, vol. 20, pp. 1-8, 2021