Report summary

University of Michigan–ann Arbor Department of Mathematics in 2015-2026 reads as a 119-PI network with 32 internal PI collaborations. The dominant subject mix is Mathematics as the leading field (46% of slots across 91 PIs; 91 labels), Geometry and Topology as the leading subfield (21% of slots across 64 PIs; 64 labels), and Algebraic Geometry and Number Theory as the leading topic (9% of slots across 31 PIs; 31 labels). That is of concern for a 119-PI roster; the strongest pairings may be carrying much of the visible collaboration. The leading PI names are Erhan Bayraktar (100.3 weighted works; COVID-19 epidemiological studies, COVID-19 Pandemic Impacts). The most visible ties are Yuri Gurevich and Andreas Blass (11 shared works, weight 11). The leading breakdown groups are group 1 with 7 PIs, 6 internal connections, weight 12.4, around Economics and Econometrics, Finance, Management Science and Operations Research, led by Erhan Bayraktar, Virginia R. Young, Bingyan Han; group 2 with 7 PIs, 7 internal connections, weight 12, around Endocrine and Autonomic Systems, Experimental and Cognitive Psychology, Modeling and Simulation, led by Helen J. Burgess, Marisa C. Eisenberg, Trachette L. Jackson.