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 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 897—1117
 $L^2$-error analysis of fully discrete discontinuous Galerkin approximations for nonlinear Sobolev equations Mi Ray Ohm and Hyun Young Lee MSC numbers : 65M15, 65N30 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 897—915
 Generalized derivations with annihilator conditions in prime rings Yu Wang MSC numbers : 16W25, 16N60, 16R50 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 917—922
 Strong limit theorems for weighted sums of NOD sequence and exponential inequalities Xuejun Wang, Shuhe Hu, and Andrei I. Volodin MSC numbers : 60F15, 60E15 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 923—938
 Matching theorems and simultaneous relation problems Mircea Balaj and Lucian Coroianu MSC numbers : 47H10, 49J53 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 939—949
 A note on the Br\"{u}ck conjecture Feng L\"{u} MSC numbers : 30D35, 30D45 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 951—957
 On the stability of bi-derivations in Banach algebras Yong-Soo Jung and Kyoo-Hong Park MSC numbers : 39B72, 39B52 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 959—967
 Ranks of submatrices in a general solution to a quaternion system with applications Hua-Sheng Zhang and Qing-Wen Wang MSC numbers : 15A03, 15A09, 15A24, 11R52 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 969—990
 An iteration schemes for nonexpansive mappings and variational inequalities Hongjun Wang and Yisheng Song MSC numbers : 47H06, 47J05, 47J25, 47H10, 47H17 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 991—1002
 Convolutions of white noise operators Un Cig Ji and Young Yi Kim MSC numbers : Primary 60H40; Secondary 46F25 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1003—1014
 On fixed points on compact Riemann surfaces Grzegorz Gromadzki MSC numbers : Primary 30F10; Secondary 14H37, 14H55, 20B25 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1015—1021
 An Ekeland type variational principle on gauge spaces with applications to fixed point theory, drop theory and coercivity Jong-Sook Bae, Seong-Hoon Cho, and Jeong-Jin Kim MSC numbers : 54H25, 49J40, 49J45 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1023—1032
 Multiplicative set of idempotents in a semiperfect ring Sangwon Park and Juncheol Han MSC numbers : Primary 16L30; Secondary 16U60 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1033—1039
 A new kind of the law of the iterated logarithm for product of a certain partial sums Qing-Pei Zang MSC numbers : 60F15 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1041—1046
 Existence and uniqueness of positive solutions for second-order Sturm-Liouville and multi-point problems on time scales Yanbin Sang, Zhongli Wei, and Wei Dong MSC numbers : 34B15, 39A10 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1047—1061
 Approximation of cubic mappings with $n$-variables in $\beta$-normed left Banach modules on Banach algebras Majid Eshaghi Gordji, Hamid Khodaei, and Abbas Najati MSC numbers : 39B82, 39B52, 46H25 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1063—1078
 Convergence of the Newton's method for an optimal control problems for Navier-Stokes equations Youngmi Choi, Sangdong Kim, and Hyung-Chun Lee MSC numbers : 65N30, 49K20 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1079—1092
 Compact matrix operators between the spaces $m(\phi)$, $n(\phi)$ and $\ell_{p}$ Eberhard Malkowsky and Mohammad Mursaleen MSC numbers : Primary 46B15; Secondary 46B45 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1093—1103
 Approximation and interpolation in the space of continuous functions vanishing at infinity M\'arcia Kashimoto MSC numbers : Primary 41A65; Secondary 41A05 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1105—1109
 Radial symmetry of topological solutions in the self-dual Maxwell-Chern-Simons gauged $O(3)$ sigma model Kyungwoo Song MSC numbers : 81T13, 35B40, 35J61 Bull. Korean Math. Soc. 2011 Vol. 48, No. 5, 1111—1117