Valentı́n Gregori

3.1k total citations · 1 hit paper
70 papers, 2.1k citations indexed

About

Valentı́n Gregori is a scholar working on Geometry and Topology, Management Science and Operations Research and Astronomy and Astrophysics. According to data from OpenAlex, Valentı́n Gregori has authored 70 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Geometry and Topology, 23 papers in Management Science and Operations Research and 17 papers in Astronomy and Astrophysics. Recurrent topics in Valentı́n Gregori's work include Fixed Point Theorems Analysis (43 papers), Fuzzy and Soft Set Theory (22 papers) and Advanced Differential Geometry Research (17 papers). Valentı́n Gregori is often cited by papers focused on Fixed Point Theorems Analysis (43 papers), Fuzzy and Soft Set Theory (22 papers) and Advanced Differential Geometry Research (17 papers). Valentı́n Gregori collaborates with scholars based in Spain, France and Portugal. Valentı́n Gregori's co-authors include Almanzor Sapena, Samuel Morillas, Salvador Romaguera, Juan-José Miñana, Guillermo Peris‐Fajarnés, Antonio Hervás, P. Veeramani, J. Ferrer, Stefan Schulte and Etienne E. Kerre and has published in prestigious journals such as SHILAP Revista de lepidopterología, IEEE Transactions on Image Processing and Sensors.

In The Last Decade

Valentı́n Gregori

68 papers receiving 1.9k citations

Hit Papers

On fixed-point theorems in fuzzy metric spaces 2002 2026 2010 2018 2002 100 200 300
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. On fixed-point theorems in fuzzy metric spaces
    2002 340 citations Valentı́n Gregori, Almanzor Sapena Fuzzy Sets and Systems profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Valentı́n Gregori Spain 25 1.5k 606 520 351 334 70 2.1k
Almanzor Sapena Spain 16 780 0.5× 276 0.5× 248 0.5× 190 0.5× 159 0.5× 37 1.1k
Salvador Romaguera Spain 27 2.6k 1.8× 845 1.4× 81 0.2× 454 1.3× 14 0.0× 191 2.9k
Ralph Kopperman United States 18 439 0.3× 372 0.6× 571 1.1× 62 0.2× 3 0.0× 61 1.2k
Piotr Mikusiński United States 17 63 0.0× 68 0.1× 120 0.2× 44 0.1× 10 0.0× 56 742
Siegfried Graf Germany 17 206 0.1× 70 0.1× 292 0.6× 5 0.0× 14 0.0× 40 1.2k
Jacob Burbea United States 14 202 0.1× 74 0.1× 70 0.1× 14 0.0× 9 0.0× 61 1.0k
Vasile Berinde Romania 27 2.4k 1.7× 43 0.1× 26 0.1× 238 0.7× 8 0.0× 116 2.9k
Erwin Lutwak United States 35 1.6k 1.1× 36 0.1× 120 0.2× 329 0.9× 3 0.0× 80 5.4k
Sorin G. Gal Romania 23 233 0.2× 488 0.8× 78 0.1× 11 0.0× 6 0.0× 175 2.7k
Ralph Howard United States 14 167 0.1× 10 0.0× 63 0.1× 113 0.3× 7 0.0× 37 671

Countries citing papers authored by Valentı́n Gregori

Since Specialization
Citations

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

Fields of papers citing papers by Valentı́n Gregori

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Valentı́n Gregori

This figure shows the co-authorship network connecting the top 25 collaborators of Valentı́n Gregori. A scholar is included among the top collaborators of Valentı́n Gregori 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 Valentı́n Gregori. Valentı́n Gregori 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.
Gregori, Valentı́n, et al.. (2025). On the Axiomatic of GV-Fuzzy Metric Spaces and Its Completion. Axioms. 14(2). 89–89.
2.
Gregori, Valentı́n, et al.. (2024). On Completeness and Fixed Point Theorems in Fuzzy Metric Spaces. Mathematics. 12(2). 287–287. 3 indexed citations
3.
Gregori, Valentı́n, et al.. (2020). A Characterization of Strong Completeness in Fuzzy Metric Spaces. Mathematics. 8(6). 861–861. 28 indexed citations
4.
Gregori, Valentı́n, et al.. (2018). Fuzzy partial metric spaces. International Journal of General Systems. 48(3). 260–279. 14 indexed citations
5.
Gregori, Valentı́n, Juan-José Miñana, & Almanzor Sapena. (2017). Completable fuzzy metric spaces. Topology and its Applications. 225. 103–111. 9 indexed citations
6.
Gregori, Valentı́n, Juan-José Miñana, Samuel Morillas, & Almanzor Sapena. (2016). Characterizing a class of completable fuzzy metric spaces. Topology and its Applications. 203. 3–11. 13 indexed citations
7.
Gregori, Valentı́n, et al.. (2015). ERRORES, OPTIMIZACIÓN Y RESOLUCIÓN NUMÉRICA DE SISTEMAS. 1 indexed citations
8.
Gregori, Valentı́n, Juan-José Miñana, & Samuel Morillas. (2013). A note on local bases and convergence in fuzzy metric spaces. Topology and its Applications. 163. 142–148. 9 indexed citations
9.
Gregori, Valentı́n, et al.. (2013). El concepto de métrica fuzzy a través del filtrado de imágenes digitales. SHILAP Revista de lepidopterología. 6. 5–5. 1 indexed citations
10.
Gregori, Valentı́n, et al.. (2009). On convergence in fuzzy metric spaces. Topology and its Applications. 156(18). 3002–3006. 42 indexed citations
11.
Morillas, Samuel, Valentı́n Gregori, & Antonio Hervás. (2009). Fuzzy Peer Groups for Reducing Mixed Gaussian-Impulse Noise From Color Images. IEEE Transactions on Image Processing. 18(7). 1452–1466. 97 indexed citations
12.
Gregori, Valentı́n, et al.. (2009). Some improvements for image filtering using peer group techniques. Image and Vision Computing. 28(1). 188–201. 27 indexed citations
13.
Gregori, Valentı́n, et al.. (2005). On completion of fuzzy quasi-metric spaces. Topology and its Applications. 153(5-6). 886–899. 18 indexed citations
14.
Gregori, Valentı́n, Salvador Romaguera, & Almanzor Sapena. (2004). A characterization of bicompletable fuzzy quasi-metric spaces. Fuzzy Sets and Systems. 152(2). 395–402. 11 indexed citations
15.
Gregori, Valentı́n & Almanzor Sapena. (2002). On fixed-point theorems in fuzzy metric spaces. Fuzzy Sets and Systems. 125(2). 245–252. 340 indexed citations breakdown →
16.
Gregori, Valentı́n & Salvador Romaguera. (2000). Approximate quantities, hyperspaces and metric completeness. Bollettino Della Unione Matematica Italiana. 751–755. 1 indexed citations
17.
Ferrer, J., Valentı́n Gregori, & Ivan L. Reilly. (1995). Some properties of semi-continuous functions and quasi-uniform spaces.. 47. 11–18. 1 indexed citations
18.
Gregori, Valentı́n, et al.. (1992). On some questions in quasi-uniform topological spaces.. 13(1). 37–42. 1 indexed citations
19.
Ferrer, J. & Valentı́n Gregori. (1983). A sequentially compact non-compact quasi-pseudometric space. Monatshefte für Mathematik. 96(4). 269–270. 6 indexed citations
20.
Gregori, Valentı́n, et al.. (1982). Quasi-metrization and completion for Pervin's quasi-uniformity. 6(2). 151–156. 1 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Almanzor Sapena Breakdown of academic impact, for papers by Salvador Romaguera Breakdown of academic impact, for papers by Ralph Kopperman Breakdown of academic impact, for papers by Piotr Mikusiński Breakdown of academic impact, for papers by Siegfried Graf Breakdown of academic impact, for papers by Jacob Burbea Breakdown of academic impact, for papers by Vasile Berinde Breakdown of academic impact, for papers by Erwin Lutwak Breakdown of academic impact, for papers by Sorin G. Gal Breakdown of academic impact, for papers by Ralph Howard
Rankless by CCL
2026