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 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 535—813Download front and back covers
 Isolation numbers of integer matrices and their preservers LeRoy B. Beasley, Kyung-Tae Kang, Seok-Zun Song MSC numbers : 15A86, 15A04, 15A33 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 535—545
 The local time of the linear self-attracting diffusion driven by weighted fractional Brownian motion Qin Chen, Guangjun Shen, Qingbo Wang MSC numbers : 60G15, 60J55, 60H05 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 547—568
 Positively weak measure expansive differentiable maps Jiweon Ahn, Manseob Lee MSC numbers : Primary 37C20, 37D20 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 569—581
 Weighted composition operators on Bers-type spaces of Loo-Keng Hua domains Zhi-jie Jiang, Zuo-an Li MSC numbers : Primary 42A18; Secondary 47B33 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 583—595
 Global uniqueness for the Radon transform Takashi Takiguchi MSC numbers : 44A12, 46F15, 46F20 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 597—605
 On the convergence of series for rowwise sums of negatively superadditive dependent random variables Haiwu Huang, Qingxia Zhang MSC numbers : 60F15 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 607—622
 The Frobenius problem for numerical semigroups generated by the Thabit numbers of the first, second kind base $b$ and the Cunningham numbers Kyunghwan Song MSC numbers : Primary 11A67, 20M30 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 623—647
 The 3D Boussinesq equations with regularity in the horizontal component of the velocity Qiao Liu MSC numbers : 35Q355, 35B65, 76D03 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 649—660
 Helmholtz decomposition and semigroup theory to the fluid around a moving body Hyeong-Ohk Bae MSC numbers : 76D05, 35Q35 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 661—676
 Positive solutions of a reaction-diffusion system with Dirichlet boundary condition Zhan-Ping Ma, Shao-Wen Yao MSC numbers : 35K57, 35B32, 92D25 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 677—690
 Weakly $\oplus$-supplemented modules and weakly $D2$ modules Phan The Hai, Muhammet Tamer Ko\c{s}an, Truong Cong Quynh MSC numbers : 16D40, 16D80, 16N80 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 691—707
 A note on generalized derivations as a Jordan homomorphisms Arusha Chandrasekhar, Shailesh Kumar Tiwari MSC numbers : 16W25, 16N60 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 709—737
 Semisymmetric cubic graphs of order $34p^3$ Mohammad Reza Darafsheh, Mohsen Shahsavaran MSC numbers : 05E18, 20D60, 05C25, 20B25 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 739—750
 An average of surfaces as functions in the two-parameter Wiener space for a probabilistic 3D shape model Jeong-Gyoo Kim MSC numbers : 28C20, 46G12, 60G15 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 751—762
 On $w$-copure flat modules and dimension El Mehdi Bouba, Hwankoo Kim, Mohammed Tamekkante MSC numbers : 13D05, 13D07, 13H05 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 763—780
 Homological properties of semi-Wakamatsu-tilting modules Dajun Liu, Jiaqun Wei MSC numbers : Primary 18G35, 16G10; Secondary 18E30, 16E05 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 781—802
 Finitely generated $G$-projective modules over PVMDs Kui Hu, Jung Wook Lim, Shiqi Xing MSC numbers : 13G05, 13D03 Bull. Korean Math. Soc. 2020 Vol. 57, No. 3, 803—813