Eungil Ko

1.4k total citations
123 papers, 823 citations indexed

About

Eungil Ko is a scholar working on Applied Mathematics, Mathematical Physics and Algebra and Number Theory. According to data from OpenAlex, Eungil Ko has authored 123 papers receiving a total of 823 indexed citations (citations by other indexed papers that have themselves been cited), including 117 papers in Applied Mathematics, 68 papers in Mathematical Physics and 57 papers in Algebra and Number Theory. Recurrent topics in Eungil Ko's work include Holomorphic and Operator Theory (115 papers), Advanced Topics in Algebra (57 papers) and Algebraic and Geometric Analysis (45 papers). Eungil Ko is often cited by papers focused on Holomorphic and Operator Theory (115 papers), Advanced Topics in Algebra (57 papers) and Algebraic and Geometric Analysis (45 papers). Eungil Ko collaborates with scholars based in South Korea, United States and Japan. Eungil Ko's co-authors include Ji Eun Lee, Il Bong Jung, Carl Pearcy, Muneo Chō, Carl C. Cowen, Ciprian Foiaş, Ji‐Eun Park, Sehee Kim, Slaviša V. Djordjević and Sang Soo Park and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Transactions of the American Mathematical Society and Applied Mathematics and Computation.

In The Last Decade

Eungil Ko

95 papers receiving 724 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Eungil Ko South Korea	14	781	377	376	209	144	123	823
Muneo Chō Japan	15	556 0.7×	347 0.9×	235 0.6×	193 0.9×	101 0.7×	84	621
B. P. Duggal United Kingdom	16	841 1.1×	652 1.7×	287 0.8×	278 1.3×	71 0.5×	141	895
Warren R. Wogen United States	14	518 0.7×	248 0.7×	284 0.8×	133 0.6×	101 0.7×	39	605
Antonio M. Peralta Spain	18	401 0.5×	843 2.2×	653 1.7×	101 0.5×	129 0.9×	112	896
Krzysztof Jarosz United States	14	291 0.4×	428 1.1×	343 0.9×	68 0.3×	127 0.9×	66	564
Jörg Eschmeier Germany	10	347 0.4×	298 0.8×	181 0.5×	61 0.3×	78 0.5×	39	424
Mark Stankus United States	9	497 0.6×	337 0.9×	289 0.8×	188 0.9×	44 0.3×	14	547
Alan Lambert United States	13	371 0.5×	268 0.7×	234 0.6×	104 0.5×	57 0.4×	39	463
Osamu Hatori Japan	13	230 0.3×	314 0.8×	347 0.9×	98 0.5×	82 0.6×	60	462
Félix Cabello Sánchez Spain	15	304 0.4×	469 1.2×	179 0.5×	68 0.3×	157 1.1×	76	538

Countries citing papers authored by Eungil Ko

Since Specialization

Citations

This map shows the geographic impact of Eungil Ko's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Eungil Ko with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Eungil Ko more than expected).

Fields of papers citing papers by Eungil Ko

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Eungil Ko. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Eungil Ko. The network helps show where Eungil Ko may publish in the future.

Co-authorship network of co-authors of Eungil Ko

This figure shows the co-authorship network connecting the top 25 collaborators of Eungil Ko. A scholar is included among the top collaborators of Eungil Ko based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Eungil Ko. Eungil Ko is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ko, Eungil, et al.. (2024). On C-Normal Operator Matrices. Results in Mathematics. 79(5).

Ko, Eungil, et al.. (2024). Matrix representation of Toeplitz operators on Newton spaces. Journal of Inequalities and Applications. 2024(1). 1 indexed citations

Ko, Eungil, et al.. (2024). Expansivity and Contractivity of Toeplitz Operators on Newton Spaces. Mediterranean Journal of Mathematics. 21(2). 2 indexed citations

Ko, Eungil, et al.. (2023). Remarks on n-power quasinormal operators. Filomat. 37(11). 3371–3381.

Ko, Eungil, et al.. (2022). On hyponormality of the sum of two composition operators. Filomat. 36(11). 3561–3572.

Ko, Eungil. (2018). On operators with similar positive parts. Journal of Mathematical Analysis and Applications. 463(1). 276–293. 3 indexed citations

Ko, Eungil, et al.. (2015). ON OPERATORS WHICH ARE POWER SIMILAR TO HYPONORMAL OPERATORS. Osaka Journal of Mathematics. 52(3). 833–847. 1 indexed citations

Ko, Eungil & Ji Eun Lee. (2015). On complex symmetric Toeplitz operators. Journal of Mathematical Analysis and Applications. 434(1). 20–34. 32 indexed citations

Ko, Eungil, et al.. (2014). Complex symmetric weighted composition operators on H2(D). Journal of Functional Analysis. 267(2). 323–351. 47 indexed citations

10.

Ko, Eungil, et al.. (2011). Subscalarity of (p,k)-quasihyponormal operators. Journal of Mathematical Analysis and Applications. 380(1). 76–86. 1 indexed citations

11.

Ko, Eungil, et al.. (2011). On scalar extensions and spectral decompositions of complex symmetric operators. Journal of Mathematical Analysis and Applications. 384(2). 252–260. 13 indexed citations

12.

Cowen, Carl C. & Eungil Ko. (2010). Hermitian weighted composition operators on 𝐻². Transactions of the American Mathematical Society. 362(11). 5771–5801. 39 indexed citations

13.

Jung, Il Bong, Eungil Ko, & Carl Pearcy. (2007). A note on the spectral mapping theorem. Kyungpook mathematical journal. 47(1). 77–79. 2 indexed citations

14.

Kim, Insook, et al.. (2007). Some connections between an operator and its Helton class. Journal of Mathematical Analysis and Applications. 340(2). 1235–1240. 1 indexed citations

15.

Ko, Eungil. (2006). p-Quasihyponormal operators have scalar extensions of order 6. Journal of Mathematical Analysis and Applications. 330(1). 80–90.

16.

Ko, Eungil. (2003). Square roots of semihyponormal operators have scalar extensions. Bulletin des Sciences Mathématiques. 127(6). 557–567. 1 indexed citations

17.

Jung, Il Bong, Eungil Ko, & Carl Pearcy. (1999). Operators : their Aluthge transforms and invariant subspaces (Operator Inequalities and related topics). Kyoto University Research Information Repository (Kyoto University). 1080. 1–5. 2 indexed citations

18.

Ko, Eungil. (1998). REMARK ON GENERALIZED k-QUASIHYPONORMAL OPERATORS. Bulletin of the Korean Mathematical Society. 35(4). 701–707. 1 indexed citations

19.

Ko, Eungil. (1997). Operators on a finite dimensional space. Bulletin of the Korean Mathematical Society. 34(1). 19–28. 3 indexed citations

20.

Ko, Eungil. (1996). On a clary theorem. Bulletin of the Korean Mathematical Society. 33(1). 29–33. 3 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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