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 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1627—1930Download front and back covers
 Skew cyclic codes over $\mathbb{F}_p+v\mathbb{F}_p+v^2\mathbb{F}_p$ Hamed Mousavi, Ahmad Moussavi, Saeed Rahimi MSC numbers : Primary 11T71, 16S36, 68P30 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1627—1638
 Nonlocal boundary value problems for Hilfer fractional differential equations Suphawat Asawasamrit, Atthapol Kijjathanakorn, Sotiris K. Ntouyas, Jessada Tariboon MSC numbers : 26A33, 34A08, 34B15 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1639—1657
 On a Waring-Goldbach problem involving squares, cubes and biquadrates Yuhui Liu MSC numbers : 11P32, 11N36 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1659—1666
 On the location of eigenvalues of real constant row-sum matrices Frank J. Hall, Rachid Marsli MSC numbers : 15A18, 15A42, 15B51 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1691—1701
 Fourth Hankel determinant for the family of functions with bounded turning Muhammad Arif, Lubna Rani, Mohsan Raza, Pawel Zaprawa MSC numbers : 30C45, 30C50 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1703—1711
 On commutativity of regular products Tai Keun Kwak, Yang Lee, Yeonsook Seo MSC numbers : 16U80, 16S50 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1713—1726
 A class of edge ideals with regularity at most four Seyed Abbas Seyedmirzaei, Siamak Yassemi MSC numbers : Primary 13D02, 13F55; Secondary 05E45 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1749—1754
 Properties on $q$-difference Riccati equation Zhi-Bo Huang, Ran-Ran Zhang MSC numbers : Primary 39B32; Secondary 30D35 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1755—1771
 Inversion of the classical Radon transform on $\mathbb{Z}^n_p$ Yung Duk Cho, Jong Yoon Hyun, Sunghwan Moon MSC numbers : 44A12, 15A03 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1773—1781
 Logharmonic mappings with typically real analytic components Zayid AbdulHadi, Najla M. Alarifi, Rosihan M. Ali MSC numbers : Primary 30C35, 30C45 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1783—1789
 Quantitative weighted bounds for the vector-valued singular integral operators with nonsmooth kernels Guoen Hu MSC numbers : 42B20 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1791—1809
 Distribution of the approximation exponents of a family of power series over a finite field Khalil Ayadi, Iheb Elouaer MSC numbers : 11J61, 11J70 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1811—1822
 Euclidean submanifolds with conformal canonical vector field Bang-Yen Chen, Sharief Deshmukh MSC numbers : 53A07, 53C40, 53C42 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1823—1834
 Finite $p$-groups in which the normalizer of every non-normal subgroup is contained in its normal closure Pengfei Bai, Xiuyun Guo, Junxin Wang MSC numbers : 20D15, 20D25 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1835—1843
 The generalized Fermat type difference equations Kai Liu, Lei Ma, Xiaoyang Zhai MSC numbers : Primary 30D35, 39A05 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1845—1858
 The sharp bound of the third Hankel determinant for some classes of analytic functions Bogumila Kowalczyk, Adam Lecko, Millenia Lecko, Young Jae Sim MSC numbers : Primary 30C45 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1859—1868
 Some properties of the Bernoulli numbers of the second kind and their generating function Feng Qi, Jiao-Lian Zhao MSC numbers : Primary 11B68; Secondary 11B37, 11B73, 34A05, 34A30, 34A34 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1909—1920
 Stability in functional difference equations with applications to infinite delay Volterra difference equations Youssef N. Raffoul MSC numbers : Primary 39A10, 39A11, 39A12 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1921—1930
 On the minimum order of 4-lazy cops-win graphs Kai An Sim, Ta Sheng Tan, Kok Bin Wong MSC numbers : 05C57, 05C80 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1667—1690
 Graded post-Lie algebra structures, Rota-Baxter operators and Yang-Baxter equations on the W-algebra $W(2, 2)$ Xiaomin Tang, Yongyue Zhong MSC numbers : 17A30, 17B68 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1727—1748
 On discontinuous elliptic problems involving the fractional $p$-Laplacian in $\mathbb R^{N}$ In Hyoun Kim, Yun-Ho Kim, Kisoeb Park MSC numbers : 35R11, 35J60, 47H11 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1869—1889
 $S$-shaped connected component for a nonlinear Dirichlet problem involving mean curvature operator in one-dimension Minkowski space Ruyun Ma, Man Xu MSC numbers : 34B10, 34B18, 34C23, 35B40, 35J65 Bull. Korean Math. Soc. 2018 Vol. 55, No. 6, 1891—1908