Report summary

The 2015-2026 picture for Nagoya University School of Mathematics is a 118-PI network with 25 internal PI collaborations. The main research signal is Mathematics as the leading field (61% of slots across 106 PIs; 106 labels), Geometry and Topology as the leading subfield (22% of slots across 63 PIs; 63 labels), and Algebraic structures and combinatorial models as the leading topic (11% of slots across 38 PIs; 38 labels). That is a thin collaboration pattern, useful for spotting individual pairs but less persuasive as a broad departmental network. The leading PI names are Masahito Hayashi (88.6 weighted works; Quantum Information and Cryptography, Quantum Computing Algorithms and Architecture). The clearest collaboration lines are Ryo Takahashi and Toshinori Kobayashi (5 shared works, weight 4.1); Ryo Takahashi and Hiroki Matsui (4 shared works, weight 3.5). The leading breakdown groups are group 1 with 6 PIs, 5 internal connections, weight 4.6, around Artificial Intelligence, Algebra and Number Theory, Geometry and Topology, led by Masahito Hayashi, François Le Gall, Shintarou Yanagida.