### Table of Contents

#### Articles

An Incremental Approach to Share-Frequent Itemsets Mining | |

Chayanan Nawapornanan, Sarun Intakosum, Veera Boonjing | 1-23 |

Existence Results for Second Order Neutral Integrodifferential Equations of Sobolev Type in Banach Spaces | |

Bheeman Radhakrishnan | 25-47 |

Common Fixed Points of an Iterative Method for Berinde Nonexpansive Mappings | |

Limpapat Bussaban, Atichart Kettapun | 49-60 |

A Hybrid Subgradient Algorithm for Finding a Common Solution of Pseudomonotone Equilibrium Problems and Hierarchical Fixed Point Problems of Nonexpansive Mappings | |

Rattanaporn Wangkeeree, Kiattisak Rattanaseeha, Rabian Wangkeeree | 61-77 |

On Generalized Strong Vector Variational Inequality Problem with Fuzzy Mappings | |

S.M. Halimi, A.P. Farajzadeh, A. Kaewcharoen | 79-87 |

Strong Convergence for $ANI$ Mappings | |

Kamonrat Nammanee, Kornwirin Chumuang, Raweewan Gatema, Supansa Jaipanya, Rungthip Sudseangsang | 89-101 |

Characterizations of Fuzzy Ideals of Semigroups by Soft Sets | |

Manoj Siripitukdet | 103-120 |

Tripled Coincidence Point Theorems with $M$-Invariant Set for a $\alpha$-$\psi$-Contractive Mapping in Partially Metric Spaces | |

Phakdi Charoensawan | 121-138 |

Approximating Common Fixed Points of Two $\alpha$-Nonexpansive Mappings | |

Khanitin Muangchoo-in, Poom Kumam, Yeol Je Cho | 139-145 |

On Optimization via $\epsilon$-Generalized Weak Subdifferentials | |

P. Cheraghi, A.P. Farajzadeh, S. Suantai | 147-164 |

Regular Elements of the Variant Semigroups of Transformations Preserving Double Direction Equivalences | |

Winita Yonthanthum | 165-171 |

Existence of Best Proximity Points for a Class of Generalized Cyclic Contraction Mappings | |

Somboon Niyom, Pornpimon Boriwan, Narin Petrot | 173-182 |

Convergence Theorems of Iterative Methods for System of Strongly Nonlinear Nonconvex Variational Inequalities | |

Issara Inchan | 183-194 |

On the Delta-Hedging of the Option Price on Future from the Black-Scholes Equation | |

Amnuay Kananthai, Rujira Ouncharoen | 195-202 |

Convergence Analysis for Relaxed Extragradient Method and Variational Inequality Problem with Numerical Example | |

Keerati Siriyan, Atid Kangtunyakarn | 203-218 |

Some Convergence Theorems of Three-Step Iteration for $G$-Nonexpansive Mappings on Banach Spaces with Graph | |

Yaowaluk Alibaud, Sarachai Kongsiriwong, Orawan Tripak | 219-228 |

Some Notes on Cone Metric Spaces | |

M. Tavakoli, A.P. Farajzadeh, T. Abdeljawad, S. Suantai | 229-242 |

The Modified Viscosity Iteration with $m$-Generalized Hybrid Mappings and $(a,b)$-Monotone Mappings for Equilibrium Problems | |

Pichada Sadeewong, Teerapol Saleewong, Poom Kumam, Yeol Je Cho | 243-265 |

On the Inequalities Concerning to the Polar Derivative of a Polynomial with Restricted zeros | |

Irshad Ahmad, Abdul Liman, Wali Mohammad Shah | 267-274 |

Dissipative Extensions of Fourth Order Differential Operators | |

Huseyin Tuna, Bilender Pasaoglu Allahverdiev | 275-285 |

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

**Copyright** 2020 by the Mathematical Association of Thailand.

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|ISSN 1686-0209|