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 Upper bounds of second Hankel determinant for universally prestarlike functions Om Ahuja, Murugesan Kasthuri, Gangadharan Murugusundaramoorthy, Kaliappan Vijaya MSC numbers : Primary 30C45 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1019—1030
 Weakly $(m,n)$-closed ideals and $(m,n)$-von Neumann regular rings David F. Anderson, Ayman Badawi, Brahim Fahid MSC numbers : Primary 13A15; Secondary 13F05, 13G05 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1031—1043
 Nuclearity properties and $C^*$-envelopes of operator system inductive limits Ajay Kumar, Preeti Luthra MSC numbers : Primary 46L06, 46L07; Secondary 46L05, 47L25 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1045—1061
 Estimation of drift parameter and change point via Kalman-Bucy filter for linear systems with signal driven by a fractional Brownian motion and observation driven by a Brownian motion Mahendra Nath Mishra, Bhagavatula Lakshmi Surya Prakasa Rao MSC numbers : Primary 62M20, 60G22, 60G35, 93E11; Secondary 62M20, 60G22, 60G35, 93E11 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1063—1073
 Lightlike hypersurfaces of an indefinite trans-Sasakian manifold with an $(\ell,\,m)$-type connection Dae Ho Jin MSC numbers : Primary 53C25, 53C40, 53C50 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1075—1089
 Kazdan-Warner equation on infinite graphs Huabin Ge, Wenfeng Jiang MSC numbers : Primary 35R02; Secondary 35K55 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1091—1101
 Vanishing properties of $p$-harmonic $\ell$-forms on Riemannian manifolds Nguyen Thac Dung, Pham Trong Tien MSC numbers : 53C24, 53C21 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1103—1129
 Stability of weak measure expansive diffeomorphisms Jiweon Ahn, Soyean Kim MSC numbers : 37A05, 37C20, 37C05, 37D20 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1131—1142
 Singular clean rings Afshin Amini, Babak Amini, Afsaneh Nejadzadeh, Habib Sharif MSC numbers : 16U99, 16N40 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1143—1156
 Topological entropy of switched systems Yu Huang, Xingfu Zhong MSC numbers : 37A35, 37B10, 37B40, 37B55 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1157—1175
 Corrigendum to "Insertion-of-Factors-Property with factors maximal ideals" [J. Korean Math. Soc. 52 (2015), No. 3, pp. 649--661] Hai-lan Jin, Da Woon Jung, Yang Lee, Sung Ju Ryu, Hyo Jin Sung, Sang Jo Yun MSC numbers : 16D25 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1177—1178
 $q$-Addition theorems for the $q$-Appell polynomials and the associated classes of $q$-polynomials expansions Patrick Njionou Sadjang MSC numbers : 33D15, 33D45, 11B68, 11B73, 11B83 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1179—1192
 When nilpotents are contained in Jacobson radicals Chang Ik Lee, Soo Yong Park MSC numbers : 16N20, 16N40 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1193—1205
 Euler sums of generalized hyperharmonic numbers Ce Xu MSC numbers : 11B73, 11B83, 11M06, 11M32, 11M99 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1207—1220
 On $\Phi$-flat modules and $\Phi$-Prufer rings Wei Zhao MSC numbers : Primary 13C05, 13C11, 13C12 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1221—1233
 Helicoidal Killing fields, helicoids and ruled minimal surfaces in homogeneous three-manifolds Young Wook Kim, Sung-Eun Koh, Hyung Yong Lee, Heayong Shin, Seong-Deog Yang MSC numbers : 53A10, 53A35, 53C30 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1235—1255
 Structure of unit-IFP rings Yang Lee MSC numbers : 16U60, 16P70, 16U80, 16N40 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1257—1268
 Infinitely many small energy solutions for equations involving the fractional Laplacian in $\mathbb R^{N}$ Yun-Ho Kim MSC numbers : 35R11, 47G20, 35A15, 58E30 J. Korean Math. Soc. 2018 Vol. 55, No. 5, 1269—1283