This map shows the geographic impact of Robert Erdahl'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 Robert Erdahl with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Robert Erdahl more than expected).
This network shows the impact of papers produced by Robert Erdahl. 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 Robert Erdahl. The network helps show where Robert Erdahl may publish in the future.
Co-authorship network of co-authors of Robert Erdahl
This figure shows the co-authorship network connecting the top 25 collaborators of Robert Erdahl.
A scholar is included among the top collaborators of Robert Erdahl 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 Robert Erdahl. Robert Erdahl is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Erdahl, Robert, et al.. (1988). The Empty Sphere Part II. Canadian Journal of Mathematics. 40(5). 1058–1073.8 indexed citations
9.
Coleman, Alan, Robert Erdahl, & Vedene H. Smith. (1987). Density matrices and density functionals : proceedings of the A. John Coleman symposium.12 indexed citations
10.
Erdahl, Robert, et al.. (1987). The Empty Sphere. Canadian Journal of Mathematics. 39(4). 794–824.22 indexed citations
Erdahl, Robert. (1974). Reduced density operators with applications to physical and chemical systems II : proceedings of a conference held at Queen's University, kingston, June 20-22, 1974, partially supported by the National Research Council of Canada.11 indexed citations
Coleman, Alan & Robert Erdahl. (1968). Reduced density matrices with applications to physical and chemical systems : proceedings of a conference held at Queen's University, Kingston, August 28-September 1, 1967, sponsored jointly by the U.S. Air Force Office of Scientific Research, the U.S. Office of Naval Research and the National Research Council of Canada. Medical Entomology and Zoology.9 indexed citations
19.
Allen, Leland C., Arthur M. Lesk, & Robert Erdahl. (1966). The Fluorides and Oxides of Helium and Neon1. Journal of the American Chemical Society. 88(3). 615–616.14 indexed citations
20.
Allen, Leland C., Robert Erdahl, & Jerry L. Whitten. (1965). Helium Difluoride. Journal of the American Chemical Society. 87(16). 3769–3771.6 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.