Stefan Czerwik

2.8k total citations · 3 hit papers
28 papers, 2.0k citations indexed

About

Stefan Czerwik is a scholar working on Applied Mathematics, Geometry and Topology and Computational Theory and Mathematics. According to data from OpenAlex, Stefan Czerwik has authored 28 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Applied Mathematics, 13 papers in Geometry and Topology and 4 papers in Computational Theory and Mathematics. Recurrent topics in Stefan Czerwik's work include Functional Equations Stability Results (12 papers), Fixed Point Theorems Analysis (10 papers) and Nonlinear Differential Equations Analysis (7 papers). Stefan Czerwik is often cited by papers focused on Functional Equations Stability Results (12 papers), Fixed Point Theorems Analysis (10 papers) and Nonlinear Differential Equations Analysis (7 papers). Stefan Czerwik collaborates with scholars based in Poland, Taiwan and Saudi Arabia. Stefan Czerwik's co-authors include Hassen Aydi, Erdal Karapınar and Ştefan Cobzaş and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Proceedings of the American Mathematical Society and Aequationes Mathematicae.

In The Last Decade

Stefan Czerwik

22 papers receiving 1.8k citations

Hit Papers

Contraction mappings in $b$-metric spaces 1993 2026 2004 2015 1993 2002 2002 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Contraction mappings in $b$-metric spaces
    1993 764 citations Stefan Czerwik Czech digital mathematics library profile →
  2. Functional Equations and Inequalities in Several Variables
    2002 381 citations Stefan Czerwik profile →
  3. Functional Equations and Inequalities in Several Variables
    2002 274 citations Stefan Czerwik WORLD SCIENTIFIC eBooks profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Stefan Czerwik Poland 9 1.3k 866 292 220 185 28 2.0k
Gerald Jungck United States 20 3.6k 2.7× 227 0.3× 56 0.2× 504 2.3× 984 5.3× 43 3.7k
Dorel Miheţ Romania 18 1.0k 0.7× 461 0.5× 113 0.4× 105 0.5× 105 0.6× 45 1.3k
T. Domínguez Benavides Spain 19 807 0.6× 475 0.5× 396 1.4× 26 0.1× 729 3.9× 71 1.1k
T. Gnana Bhaskar United States 13 896 0.7× 420 0.5× 24 0.1× 101 0.5× 231 1.2× 32 1.3k
Siegfried Gähler Germany 12 584 0.4× 297 0.3× 233 0.8× 54 0.2× 100 0.5× 28 911
W. Orlicz Poland 11 226 0.2× 435 0.5× 329 1.1× 17 0.1× 165 0.9× 28 745
Aldo Andreotti United States 20 1.1k 0.8× 760 0.9× 592 2.0× 38 0.2× 172 0.9× 38 1.5k
Sh. Rezapour Iran 18 1.2k 0.9× 318 0.4× 30 0.1× 137 0.6× 236 1.3× 45 1.5k
Ştefan Cobzaş Romania 10 333 0.2× 153 0.2× 204 0.7× 35 0.2× 197 1.1× 35 501
Łjubomir Ćirić Serbia 22 2.1k 1.6× 163 0.2× 24 0.1× 241 1.1× 466 2.5× 78 2.2k

Countries citing papers authored by Stefan Czerwik

Since Specialization
Citations

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

Fields of papers citing papers by Stefan Czerwik

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Stefan Czerwik

This figure shows the co-authorship network connecting the top 25 collaborators of Stefan Czerwik. A scholar is included among the top collaborators of Stefan Czerwik 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 Stefan Czerwik. Stefan Czerwik 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.
Cobzaş, Ştefan & Stefan Czerwik. (2020). The completion of generalized b-metric spaces and fixed points. Fixed Point Theory. 21(1). 133–150. 26 indexed citations
2.
Karapınar, Erdal, Stefan Czerwik, & Hassen Aydi. (2018). (α,ψ)-Meir-Keeler Contraction Mappings in Generalized b-Metric Spaces. Journal of Function Spaces. 2018. 1–4. 74 indexed citations
3.
Czerwik, Stefan, et al.. (2015). Fixed point theorems for a system of transformations in generalized metric spaces. Asian-European Journal of Mathematics. 8(4). 1550068–1550068. 3 indexed citations
4.
Czerwik, Stefan, et al.. (2007). On the Double Quadratic Difference Property. International Journal of Applied Mathematics & Statistics. 7. 18–26. 1 indexed citations
5.
Czerwik, Stefan. (2005). SOME RESULTS ON THE STABILITY OF THE HOMOGENEOUS FUNCTIONS. Bulletin of the Korean Mathematical Society. 42(1). 29–37. 3 indexed citations
6.
Czerwik, Stefan, et al.. (2004). Stability of the quadratic functional equation in Lipschitz spaces. Journal of Mathematical Analysis and Applications. 293(1). 79–88. 21 indexed citations
7.
Czerwik, Stefan, et al.. (2004). Quadratic difference operators in Lp-spaces. Aequationes Mathematicae. 67(1-2). 1–11. 7 indexed citations
8.
Czerwik, Stefan, et al.. (2002). Superstability of the equation of quadratic functionals in L p -spaces. Aequationes Mathematicae. 63(3). 210–219. 6 indexed citations
9.
Czerwik, Stefan. (2002). Functional Equations and Inequalities in Several Variables. WORLD SCIENTIFIC eBooks. 274 indexed citations breakdown →
10.
Czerwik, Stefan, et al.. (1999). The stability of the quadratic equation for set valued mappings. 105–116. 1 indexed citations
11.
Czerwik, Stefan. (1998). Nonlinear set-valued contraction mappings in b-metric spaces. Medical Entomology and Zoology. 46. 263–276. 372 indexed citations
12.
Czerwik, Stefan. (1993). Contraction mappings in $b$-metric spaces. Czech digital mathematics library. 1(1). 5–11. 764 indexed citations breakdown →
13.
Czerwik, Stefan. (1980). Fixed point theorems and special solutions of functional equations. 11 indexed citations
14.
Czerwik, Stefan. (1976). The existence of global solutions of a functional-differential equation. Colloquium Mathematicum. 36(1). 121–125. 7 indexed citations
15.
Czerwik, Stefan. (1976). On some functional-differential equations.. 34. 67–72. 2 indexed citations
16.
Czerwik, Stefan. (1976). A fixed point theorem for a system of multivalued transformations. Proceedings of the American Mathematical Society. 55(1). 136–139. 12 indexed citations
17.
Czerwik, Stefan. (1976). GENERALIZATION OF EDELSTEIN'S FIXED POINT THEOREM. Demonstratio Mathematica. 9(2). 3 indexed citations
18.
Czerwik, Stefan. (1974). On the existence and uniqueness of convex solutions of a functional equation in the indeterminate case. Annales Polonici Mathematici. 30(1). 5–8. 1 indexed citations
19.
Czerwik, Stefan. (1973). ON DIFFERENTIABLE SOLUTIONS OF A LINEAR FUNCTIONAL EQUATION. Demonstratio Mathematica. 6(1). 1 indexed citations
20.
Czerwik, Stefan. (1971). On the differentiability of solutions of a functional equation with respect to a parameter. Annales Polonici Mathematici. 24(2). 209–217.

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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