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 Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, : 275—533
 A note on cohomological dimension over Cohen-Macaulay rings Iraj Bagheriyeh, Kamal Bahmanpour, Ghader Ghasemi Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 275—280
 Global solution and blow-up of logarithmic Klein-Gordon equation Yaojun Ye Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 281—294
 Linear and non-linear loop-transversal codes in error-correction and graph domination Mehmet Da\v{g}l{\i}, Bokhee Im, Jonathan D. H. Smith Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 295—309
 Infinite horizon optimal control problems of backward stochastic delay differential equations in Hilbert spaces Hong Liang, Jianjun Zhou Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 311—330
 Nodal solutions for an elliptic equation in an annulus without the signum condition Tianlan Chen, Yanqiong Lu, Ruyun Ma Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 331—343
 On four new mock theta functions QiuXia Hu Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 345—354
 Bounds for radii of convexity of some $q$-Bessel functions Ibrahim Aktas, Halit Orhan Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 355—369
 Some new characterizations of quasi-Frobenius rings by using pure-injectivity Ali Moradzadeh-Dehkordi Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 371—381
 Endpoint estimates for multilinear fractional maximal operators Suixin He, Jing Zhang Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 383—391
 Asymptotic exactness of some Bank--Weiser error estimator for quadratic triangular finite element Kwang-Yeon Kim, Ju-Seong Park Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 393—406
 On the first generalized Hilbert coefficient and depth of associated graded rings Amir Mafi, Dler Naderi Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 407—417
 Notes on finitely generated flat modules Abolfazl Tarizadeh Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 419—427
 Multipliers of Dirichlet-type subspaces of Bloch space Songxiao Li, Zengjian Lou, Conghui Shen Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 429—441
 Smooth points of ${\mathcal L}_s(^nl_{\infty}^2)$ Sung Guen Kim Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 443—447
 On the actions of Higman-Thompson groups by homeomorphisms Jin Hong Kim Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 449—457
 On generalizations of skew quasi-cyclic codes Sumeyra Bedir, Fatmanur Gursoy, Irfan Siap Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 459—479
 Exact formula for Jacobi-Eisenstein series of square free discriminant lattice index Ran Xiong Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 481—488
 Evaluations of some quadratic Euler sums Xin Si, Ce Xu Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 489—508
 Fredholm Toeplitz operators on the Dirichlet spaces of the polydisk Kyunguk Na Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 509—520
 On the Bergman kernel for some Hartogs domains Jong-Do Park Bull. Korean Math. Soc. 2020 Vol. 57, No. 2, 521—533