The bibliometric data used to devise the citation-based metrics for this ranking were collected on 2026-01-12, ensuring that the information reflects the most current research impact at the time of compilation. A scientist’s position in the ranking is determined by their D-index (Discipline H-index), a refined metric that calculates impact within a specific discipline by including only those publications and citations pertinent to the field under examination—in this case, Mathematics.
Scope of the Research
To provide a robust and representative overview of scholarly excellence, a total of 279,971 scientist profiles across all disciplines were initially examined, of which 1,000 (for example) scientists specifically engaged in Mathematics research were identified and assessed. In order to qualify for inclusion in this ranking, a scientist’s D-index had to be at least 30, signifying a significant level of discipline-specific contribution. Additionally, a majority of the scientist’s tier publications were required to be concentrated in the area of Mathematics, ensuring alignment with the ranking’s disciplinary focus.
Scientist awards and achievements within the Mathematics field were also taken into account as supplementary evidence of scholarly distinction. The D-index threshold for considering top researchers is scaled in increments of 10, calibrated according to the total estimated number of scholars per discipline. This approach guarantees that the top 1% of leading scholars are consistently incorporated into the list. Furthermore, to ensure meaningful alignment between general research impact and discipline-specific impact, only researchers whose general H-index and D-index differed by 30% or less were included.
Additional Verification Practices
We acknowledge that raw bibliometric data, while foundational, cannot serve as an absolute measure of research output or influence. To safeguard the quality and reliability of the ranking, all scientist profiles were manually verified and cross-correlated against publications indexed in a wide array of trustworthy scholarly sources. This rigorously controlled verification process helps to eliminate erroneous records and improve the precision of the ranking.
While the number of papers published in prominent journals and conference proceedings does not contribute directly to the ranking position, it constitutes a valuable secondary indicator of a scientist’s contributions in their field. The ranking position itself is firmly established based on each researcher’s D-index, derived from comprehensive data from OpenAlex and CrossRef.
Researchers and interested readers are encouraged to review the detailed methodology behind the ranking construction at our methodology page.
Research.com Agenda and Mission
Research.com’s mission in creating this ranking is to motivate researchers, companies, and policymakers worldwide to closely examine the trajectories of leading experts. By providing transparent, data-driven rankings, we aim to facilitate global recognition of top researchers in specific domains, countries, and institutions. This empowers the scientific community to better identify and engage with leading experts, fostering collaboration and advancing the frontiers of knowledge across disciplines.
Our approach is defined by meticulous data collection, careful verification, and a commitment to academic rigor, ensuring that these rankings serve as a credible resource for the global research ecosystem.
