[논문]
Eungil Ko, 김연하,
On Hyponormality of the Sum of Two Composition Operators
, Filomat
, Vol.36
, No.11
, pp.3561
-3572
(Dec, 2022)
[논문]
Eungil Ko, 김연하,
Characterizations of Square Roots of Unitary Weighted Composition Operators on H2
, COMPLEX ANALYSIS AND OPERATOR THEORY
, pp.10.1007
-22pages
(Jan, 2022)
[논문]
김연하, Takahiko Nakazi, 고응일, 이종락,
Hyponormality of singular Cauchy integral operators with matrix-valued symbols
, HOKKAIDO MATHEMATICAL JOURNAL
, Vol.48
, No.2
, pp.443
-459
(Aug, 2019)
[논문]
Eungil Ko, Hanna Choi, 김연하,
On operators satisfying the generalized Cauchy-Schwarz inequality
, PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
, pp.3447
-3453
(Jan, 2017)
[논문]
Eungil Ko, Seonjin Jo, 김연하,
On Fuglede-Putnam properties
, POSITIVITY
, pp.911
-925
(Dec, 2015)
국제학술논문지
[논문]
Eungil Ko, 김연하,
On Hyponormality of the Sum of Two Composition Operators
, Filomat
, Vol.36
, No.11
, pp.3561
-3572
(Dec, 2022)
[논문]
Eungil Ko, 김연하,
Characterizations of Square Roots of Unitary Weighted Composition Operators on H2
, COMPLEX ANALYSIS AND OPERATOR THEORY
, pp.10.1007
-22pages
(Jan, 2022)
[논문]
김연하, Takahiko Nakazi, 고응일, 이종락,
Hyponormality of singular Cauchy integral operators with matrix-valued symbols
, HOKKAIDO MATHEMATICAL JOURNAL
, Vol.48
, No.2
, pp.443
-459
(Aug, 2019)
[논문]
Eungil Ko, Hanna Choi, 김연하,
On operators satisfying the generalized Cauchy-Schwarz inequality
, PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
, pp.3447
-3453
(Jan, 2017)
[논문]
Eungil Ko, Seonjin Jo, 김연하,
On Fuglede-Putnam properties
, POSITIVITY
, pp.911
-925
(Dec, 2015)
[논문]
김연하, Eungil Ko, Sungeun Jung,
Iterated Aluthge transforms of composition operators on H2
, INTERNATIONAL JOURNAL OF MATHEMATICS
, pp.1550079
-1550079
(Aug, 2015)
[논문]
김연하, Eungil Ko, Sungeun Jung,
Characterizations of binormal composition operators with linear fractional symbols on H2
, APPLIED MATHEMATICS AND COMPUTATION
, pp.252
-263
(Jun, 2015)
[논문]
Eungil Ko, Sungeun Jung, 김연하,
Commutators of weighted composition operators
, INTERNATIONAL JOURNAL OF MATHEMATICS
, pp.1450053
-1450053
(May, 2014)
[논문]
김연하, Eungil Ko, Sungeun Jung,
Composition operators for which C _{phi }^{AST } C _{phi } and C _{phi } +C _{phi } ^{AST } commute
, COMPLEX VARIABLES AND ELLIPTIC EQUATIONS
, pp.1608
-1625
(Jan, 2014)
[논문]
김연하, Eungil Ko, Sungeun Jung,
On subscalarity of some 2 × 2 class A operator matrices
, LINEAR ALGEBRA AND ITS APPLICATIONS
, pp.1322
-1338
(Feb, 2013)
[논문]
김연하, Eungil Ko, Sungeun Jung, Jieun Lee,
On (A;m)-expansive operators
, STUDIA MATHEMATICA
, pp.3
-23
(Dec, 2012)
[논문]
김연하, Eungil Ko, Insook Kim, Jieun Lee,
Some connections between an operator and its Helton class
, JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
, pp.1235
-1249
(Apr, 2008)
[논문]
김연하, Jieun Lee, Eungil Ko,
On the Helton class of p-hyponormal operators
, PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
, pp.2113
-2120
(Jul, 2007)