Abstract:These lecture notes are intended as an accessible introduction to some basic ideas of motive theory for readers with limited background in algebraic geometry. Mathematics often reveals unexpected connections between seemingly distant areas. A simple combinatorial identity may encode geometric structures, arithmetic information, or even sophisticated categorical phenomena.
In these notes, we trace a path from elementary counting arguments to Voevodsky's theory of motives. We show how some classical combinatorial identities emerge naturally from geometry, and how motivic decompositions reveal the deeper geometric and arithmetic structures underlying them. Our guiding example is provided by the Karaji--Pascal identity and its $q$-analogue, which link combinatorics and algebraic geometry.
Thus our primary aim of these lecture notes is to demonstrate that some familiar combinatorial identities can provide non-experts with an entry point to some of the basic ideas of motive theory! Moreover, while introducing the reader to the subject, we also hope to encourage the view that even an elementary mathematical formula may encode a deeper underlying geometric and arithmetic structure. Along the way, the notes offer a gentle introduction to motives through a concrete example rather than through the full technical machinery of modern theory.
From: Somayeh Habibi [view email]
[v1]
Thu, 18 Jun 2026 17:31:00 UTC (511 KB)
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