Report summary

University of Michigan–ann Arbor Department of Mathematics in 2021-2023 reads as a 73-PI network with 10 internal PI collaborations. The dominant subject mix is Mathematics as the leading field (48% of slots across 56 PIs; 56 labels), Geometry and Topology as the leading subfield (23% of slots across 43 PIs; 43 labels), and Algebraic Geometry and Number Theory as the leading topic (9% of slots across 20 PIs; 20 labels). That is of concern for a 73-PI roster; the strongest pairings may be carrying much of the visible collaboration. The leading PI names are Erhan Bayraktar (37.5 weighted works; COVID-19 epidemiological studies, COVID-19 Pandemic Impacts). The most visible ties are Indika Rajapakse and Can Chen (5 shared works, weight 2.3). The leading breakdown groups are group 1 with 6 PIs, 5 internal connections, weight 7.8, around Economics and Econometrics, Management Science and Operations Research, Finance, led by Erhan Bayraktar, Virginia R. Young, Donghan Kim.