Namjip Koo

479 total citations
47 papers, 353 citations indexed

About

Namjip Koo is a scholar working on Applied Mathematics, Control and Systems Engineering and Geometry and Topology. According to data from OpenAlex, Namjip Koo has authored 47 papers receiving a total of 353 indexed citations (citations by other indexed papers that have themselves been cited), including 36 papers in Applied Mathematics, 21 papers in Control and Systems Engineering and 14 papers in Geometry and Topology. Recurrent topics in Namjip Koo's work include Nonlinear Differential Equations Analysis (35 papers), Stability and Controllability of Differential Equations (19 papers) and Advanced Differential Equations and Dynamical Systems (14 papers). Namjip Koo is often cited by papers focused on Nonlinear Differential Equations Analysis (35 papers), Stability and Controllability of Differential Equations (19 papers) and Advanced Differential Equations and Dynamical Systems (14 papers). Namjip Koo collaborates with scholars based in South Korea, China and Brazil. Namjip Koo's co-authors include Sung Kyu Choi, Sung Kyu Park, Shengfu Deng, Weinian Zhang, Keonhee Lee, C. A. Morales, Hyun‐Hee Lee and Binggen Zhang and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Computers & Mathematics with Applications and Nonlinear Analysis.

In The Last Decade

Namjip Koo

37 papers receiving 291 citations

Peers

Namjip Koo
Junfei Cao China
You-Hui Su China
Hideaki Matsunaga Japan
Rigoberto Medina Chile
Alaa E. Hamza Egypt
Jaqueline G. Mesquita Brazil
Fozi M. Dannan Syria
Xiaoguang Qi China
Vipin Kumar India
Ewa Schmeidel Poland
Junfei Cao China
Namjip Koo
Citations per year, relative to Namjip Koo Namjip Koo (= 1×) peers Junfei Cao

Countries citing papers authored by Namjip Koo

Since Specialization
Citations

This map shows the geographic impact of Namjip Koo'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 Namjip Koo with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Namjip Koo more than expected).

Fields of papers citing papers by Namjip Koo

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Namjip Koo. 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 Namjip Koo. The network helps show where Namjip Koo may publish in the future.

Co-authorship network of co-authors of Namjip Koo

This figure shows the co-authorship network connecting the top 25 collaborators of Namjip Koo. A scholar is included among the top collaborators of Namjip Koo 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 Namjip Koo. Namjip Koo is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Koo, Namjip, et al.. (2021). ON PERIODIC SHADOWING OF INDUCED HYPERSPACE MAPS. 34(1). 55–60. 1 indexed citations
2.
Koo, Namjip, et al.. (2020). ON STABILITY OF NONLINEAR INTEGRO-DIFFERENTIAL SYSTEMS WITH IMPULSIVE EFFECT. Communications of the Korean Mathematical Society. 35(3). 879–890. 3 indexed citations
3.
Koo, Namjip, et al.. (2019). ON THE DENSITY OF VARIOUS SHADOWING PROPERTIES. Communications of the Korean Mathematical Society. 34(3). 981–989. 1 indexed citations
4.
Koo, Namjip, et al.. (2019). STABILITY PROPERTIES IN IMPULSIVE DIFFERENTIAL SYSTEMS OF NON-INTEGER ORDER. Journal of the Korean Mathematical Society. 56(1). 127–147.
5.
Choi, Sung Kyu, et al.. (2014). IMPULSIVE INTEGRAL INEQUALITIES WITH A NON-SEPARABLE KERNEL. 27(4). 651–659. 2 indexed citations
6.
Choi, Sung Kyu, et al.. (2013). STABILITY OF LINEAR IMPULSIVE DIFFERENTIAL EQUATIONS VIA t∞-SIMILARITY. 26(4). 811–819. 4 indexed citations
7.
Koo, Namjip, et al.. (2013). STABILITY FOR FRACTIONAL DIFFERENTIAL EQUATIONS. 16(2). 165–174. 6 indexed citations
8.
Choi, Sung Kyu & Namjip Koo. (2013). ON SOME NONLINEAR INTEGRAL INEQUALITIES ON TIME SCALES. 26(1). 71–84. 1 indexed citations
9.
Choi, Sung Kyu, et al.. (2011). LYAPUNOV FUNCTIONS FOR NONLINEAR DIFFERENCE EQUATIONS. 24(4). 883–893.
10.
Koo, Namjip, et al.. (2010). Volterra Discrete Inequalities of Bernoulli Type. Journal of Inequalities and Applications. 2010(1). 546423–546423. 1 indexed citations
11.
Choi, Sung Kyu & Namjip Koo. (2008). Almost Periodic Solutions of Nonlinear Discrete Volterra Equations with Unbounded Delay. Advances in Difference Equations. 2008(1). 692713–692713. 6 indexed citations
12.
Choi, Sung Kyu, et al.. (2006). h-Stability for linear dynamic equations on time scales. Journal of Mathematical Analysis and Applications. 324(1). 707–720. 23 indexed citations
13.
Choi, Sung Kyu & Namjip Koo. (2005). Asymptotic property of linear Volterra difference systems. Journal of Mathematical Analysis and Applications. 321(1). 260–272. 8 indexed citations
14.
Choi, Sung Kyu, et al.. (2005). Asymptotic property in variation for nonlinear differential systems. Applied Mathematics Letters. 18(1). 117–126. 6 indexed citations
15.
Choi, Sung Kyu & Namjip Koo. (2004). Asymptotic equivalence between two linear volterra difference systems. Computers & Mathematics with Applications. 47(2-3). 461–471. 11 indexed citations
16.
Koo, Namjip, et al.. (2001). STABILITY IN VARIATION FOR NONLINEAR VOLTERRA DIFFERENCE SYSTEMS. Bulletin of the Korean Mathematical Society. 38(1). 101–111. 3 indexed citations
17.
Choi, Sung Kyu, et al.. (2001). Variationally Stable Difference Systems. Journal of Mathematical Analysis and Applications. 256(2). 587–605. 17 indexed citations
18.
Choi, Sung Kyu, Namjip Koo, & Binggen Zhang. (2001). The oscillation of partial difference equations with continuous arguments. Computers & Mathematics with Applications. 41(12). 1495–1503. 3 indexed citations
19.
Choi, Sung Kyu & Namjip Koo. (2000). Variationally Stable Difference Systems by n∞-Similarity. Journal of Mathematical Analysis and Applications. 249(2). 553–568. 19 indexed citations
20.
Park, Sung Kyu & Namjip Koo. (1997). h-Stability of differential systems via $t_{\infty}$-similarity. Bulletin of the Korean Mathematical Society. 34(3). 371–383. 21 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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