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 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 537—794Download front and back covers
 Curvature estimates for gradient expanding Ricci solitons Liangdi Zhang MSC numbers : Primary 53C21, 53C25 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 537—557
 Invariant mean value property and $\mathcal M$-harmonicity on the half-space Boo Rim Choe, Kyesook Nam MSC numbers : Primary 31B05; Secondary 31B10, 30D45, 30D55 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 559—572
 Polynomiality of the equivariant Gromov-Witten theory of $\mathbb P^{r-1}$ Hyenho Lho MSC numbers : 14D23 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 573—591
 Fourier coefficients of weight 2 modular forms of prime level Yan-Bin Li MSC numbers : 11F30, 11D45, 11E41, 11F11 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 593—602
 Multiplicative functions which are additive on triangular numbers Poo-Sung Park MSC numbers : 11P32, 11A25 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 603—608
 Fermat's equation over 2-by-2 matrices Mao-Ting Chien, Jie Meng MSC numbers : Primary 15A24, 11D41 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 609—616
 Linear automorphisms of smooth hypersurfaces giving Galois points Taro Hayashi MSC numbers : Primary 14J70; Secondary 12F10 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 617—635
 Decomposition of the Kronecker sums of matrices into a direct sum of irreducible matrices Caixing Gu, Jaehui Park, Chase Peak, Jordan Rowley MSC numbers : Primary 47A15, 15A21; Secondary 47L40, 15A69 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 637—657
 Additive maps of semiprime rings satisfying an Engel condition Tsiu-Kwen Lee, Yu Li, Gaohua Tang MSC numbers : Primary 16R60, 16N60 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 659—668
 Admissible inertial manifolds for infinite delay evolution equations Le Anh Minh MSC numbers : Primary 34K30, 35B40, 35K58, 37L25 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 669—688
 On artinianness of general local cohomology modules Nguyen Minh Tri MSC numbers : Primary 13D45, 13E10 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 689—698
 On ampliation quasiaffine transforms of operators Eungil Ko MSC numbers : Primary 47A11; Secondary 47A10, 47B20 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 699—710
 Some results of monomial ideals on regular sequences Reza Naghipour, Somayeh Vosughian MSC numbers : 13A15, 13E05 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 711—720
 The convex hull of three boundary points in complex hyperbolic space Youngju Kim MSC numbers : Primary 30C65, 20H10; Secondary 51M10, 22E40, 32G07 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 721—727
 Global axisymmetric solutions to the 3D Navier--Stokes--Poisson--Nernst--Planck system in the exterior of a cylinder Jihong Zhao MSC numbers : Primary 35B07, 35D35, 35K55, 76W05 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 729—744
 Real-variable characterizations of variable Hardy spaces on Lipschitz domains of ${{{\mathbb R}^n}}$ Xiong Liu MSC numbers : Primary 42B30; Secondary 42B25, 46A20, 42B35, 46E30 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 745—765
 Schatten-Herz class Toeplitz operators on weighted Bergman spaces induced by doubling weights Juntao Du, Songxiao Li MSC numbers : Primary 30H20, 47B35 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 767—779
 A bound on H\"older regularity for $\overline \partial$-equation on pseudoconvex domains in $\mathbb C^n$ with some comparable eigenvalues of the Levi-form Sanghyun Cho MSC numbers : Primary 32W05, 32T25, 32F18 Bull. Korean Math. Soc. 2021 Vol. 58, No. 3, 781—794