Hiroyuki Usami

43 papers and 369 indexed citations i.

About

Hiroyuki Usami is a scholar working on Applied Mathematics, Numerical Analysis and Computational Theory and Mathematics. According to data from OpenAlex, Hiroyuki Usami has authored 43 papers receiving a total of 369 indexed citations (citations by other indexed papers that have themselves been cited), including 41 papers in Applied Mathematics, 19 papers in Numerical Analysis and 17 papers in Computational Theory and Mathematics. Recurrent topics in Hiroyuki Usami’s work include Nonlinear Differential Equations Analysis (27 papers), Differential Equations and Boundary Problems (20 papers) and Differential Equations and Numerical Methods (18 papers). Hiroyuki Usami is often cited by papers focused on Nonlinear Differential Equations Analysis (27 papers), Differential Equations and Boundary Problems (20 papers) and Differential Equations and Numerical Methods (18 papers). Hiroyuki Usami collaborates with scholars based in Japan and Canada. Hiroyuki Usami's co-authors include Yūki Naito, Ken‐ichi Kamo, Takaŝi Kusano, Manabu Naito, Akio Ogata and Charles A. Swanson and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Archive for Rational Mechanics and Analysis and Journal of Differential Equations.

In The Last Decade

Co-authorship network of co-authors of Hiroyuki Usami i

Fields of papers citing papers by Hiroyuki Usami

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Hiroyuki Usami

Since Specialization
Citations

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

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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2025