Publications
Publications
[2025]
(Sumin Kim) Invariant subspaces of Toeplitz operators with inner symbols, Banach Journal of Mathematical Analysis, 19, no. 3, (2025).
(Sumin Kim) Composition operators on the vector-valued function spaces, Complex Anal. Oper. Theory, 19, no. 3, (2025).
(In Sung Hwang, Sumin Kim and Keun Min Kim) A decomposition of matrix-valued H^2-functions, (accepted in Linear and Multilinear Algebra).
[2024]
(Sumin Kim and Jongrak Lee) A Sufficient condition for Hyponormal Toeplitz operators on the Bergman space, Bull. Korean Math. Soc., 61, No. 4, 1019--1031, (2024).
(Sumin Kim, Eungil Ko, Ji Eun Lee and Jongrak Lee) H-Toeplitz operators on the function spaces, Monatsh. Math., 205, no. 4, 757--786, (2024).
(Sumin Kim and Jongrak Lee) Toeplitz operators with monomial symbols on the Dirichlet spaces, Ann. Funct. Anal., 15, 46 (2024).
(Sumin Kim) Norm of the evaluation on the vector-valued Hardy space, J. Math. Anal. Appl., 531, no. 1, part 2, 127809, (2024).
[2023]
(Raul E. Curto, In Sung Hwang, Sumin Kim and Woo Young Lee) Circle companions of Hardy spaces of the unit disk, J. Funct. Anal., 285, no. 12, 110159, (2023).
(Sumin Kim and Jongrak Lee) Remarks on hyponormal Toeplitz operators with non-harmonic symbols, Open Math., 21, no. 1, (2023).
(Sumin Kim and Jongrak Lee) Hyponormal Toeplitz operators with non-harmonic symbols on the weighted Bergman spaces, Ann. Funct. Anal., 14, no.1, (2023).
[2022]
(In Sung Hwang and Sumin Kim) Hyponormal block Toeplitz operators and the Caratheodory interpolation problems, J. Math. Anal. Appl., 515, no. 2, 126418 (2022).
(Sumin Kim and Jongrak Lee) Contractivity and expansivity of H-Toeplitz operators on the Bergman spaces, AIMS Math., 7, no.8, 13927--13944, (2022).
[2021]
(Caxing Gu, In Sung Hwang, Sumin Kim and Woo Young Lee) An F. and M. Riesz Theorem for strong H^2-functions on the unit circle, J. Math. Anal. Appl., no. 1, 124927, (2021).
(Sumin Kim and Jongrak Lee) Hyponormality of Toeplitz operator with non-harmonic symbols on the Bergman spaces, J. Inequal. Appl., no. 67, 1--13, (2021).
(In Sung Hwang, Sumin Kim, and In Hyoun Kim) Weak subnormality of infinite 4-banded matrices, Operators and matrices, 15, no. 1, 117--125, (2021).
[~2020]
(with In Sung Hwang, Sumin Kim and In Hyoun Kim) The range of block Hankel operators, Filomat, 32, no. 9, 3237--3243, (2018).
(with In Sung Hwang, An-Hyun Kim and Sumin Kim) A rank formula for the self-commutators of rational Toeplitz tuples, J. Inequal. Appl., 2016:184, 1--14, (2016).
(Raul E. Curto, In Sung Hwang, Sumin Kim and Woo Young Lee) Halmos' Problem 5 and Abrahamse's Theorem from the perspective of vector-valued function theory.
(Sumin Kim and Jongrak Lee) Hyponormality of block Toeplitz operators on the Bergman spaces.
(Sumin Kim and Jongrak Lee) Necessary conditions of Hyponormal Toeplitz operators on the Drury-Arveson spaces H^2_2.
(Sumin Kim and Jongrak Lee) Hyponormality of Toeplitz operators on the q-Bergman Hilbert spaces.