### Table of Contents

#### Articles

Operators on Hilbert Spaces of Sequences | |

C. Shekha, B.S. Komal, M. Mursaleen | 1 - 8 |

An Observation on Set-valued Contraction Mappings in Modular Metric Spaces | |

Parin Chaipunya, Poom Kumam | 9 - 17 |

Algorithm and Theorem on Student Activity Problems | |

V. Longani, S. Buada, D. Samana | 19 - 31 |

Connections between Various Subclasses of Planar Harmonic Mappings Involving Generalized Bessel Functions | |

Saurabh Porwal | 33 - 42 |

Coupled Coincidence Point Theorems for a $(\beta,g)$-$\psi$-Contractive Mapping in Partially Ordered $G$-Metric Spaces | |

P. Charoensawan, C. Thangthong | 43 - 61 |

All Maximal Clones of a Majority Reflexive Graph | |

Udom Chotwattakawanit, Chawewan Rattanaprasert | 63 - 68 |

An Iterative Shrinking Metric f-Projection Method for Finding a Common Fixed Point of Two Quasi Strict f-Pseudo-Contractions and Applications in Hilbert Spaces | |

Kasamsuk Ungchittrakool, Duangkamon Kumtaeng | 69 - 85 |

Some Properties of a subclass of Harmonic Univalent Functions defined by fractional calculus | |

Saurabh Porwal | 87 - 107 |

Properties of Attractive Points in CAT(0) Spaces | |

K. Kunwai, A. Kaewkhao, W. Inthakon | 109 - 121 |

Parameter estimation of one-dimensional Ito processes by LTDRM | |

Piriya Prunglerdbuathong, Khamron Mekchay, Sanae Rujivan | 123 - 136 |

On (m; n)-Regularity of Gamma-Semigroups | |

Thawhat Changphas | 137 - 145 |

Note on "Modified alpha-psi-Contractive Mappings with Applications" | |

Maher Berzig, Erdal Karapinar | 147 - 152 |

Applying the Reduced Differential Transform Method to Solve the Telegraph and Cahn-Hilliard Equations | |

Mahmoud S. Rawashdeh, Nazek A. Obeidat | 153 - 163 |

A Unified Local Convergence for Jarratt-type Methods in Banach Space under Weak Conditions | |

Santhosh George, Ioannis K Argyros | 165 - 176 |

Modules which are reduced over their endomorphism rings | |

N. Agayev, Sait Halicioglu, A. Harmanci, B. Ungor | 177 - 188 |

Constant on a Uniform Berry-Esseen Bound on a Closed Sphere via Stein's Method | |

Dawud Thongtha | 189 - 199 |

A New Generalization of Hermite Matrix Polynomials | |

Bayram Cekim, Abdullah ALTIN | 201 - 212 |

Factorisable Monoid of Generalized Hypersubstitutions of Type $\tau=(2)$ | |

Ampika Boonmee, Sorasak Leeratanavalee | 213 - 225 |

Periodic Behavior of Solutions of a Certain Piecewise Linear System of Difference Equations | |

Wirot Tikjha, Somsri Jintanasonti, Yongwimon Lenbury | 227 - 236 |

Derivative-Free Broyden's Method for Inverse Partially Known Sturm-Liouville Potential Functions | |

Athassawat Kammanee | 237 - 244 |

Concircular Curvature Tensor of a Semi-Symmetric Metric Connection in a Kenmotsu Manifold | |

Ajit Barman | 245 - 257 |

**The Thai Journal of Mathematics ***is supported by *The Mathematical Association of Thailand and Thailand Research Council and the Center for Promotion of Mathematical Research of Thailand (CEPMART).

**Copyright** 2022 by the Mathematical Association of Thailand.

All rights reserve. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without the prior permission of the Mathematical Association of Thailand.

|ISSN 1686-0209|