Pierre Deligne | What is the Hodge conjecture?

Harvard CMSA

Harvard CMSA

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Millennium Prize Problems Lecture 11/12/2025

Speaker: Pierre Deligne, Institute for Advanced Study

Title: What is the Hodge conjecture?

Abstract: The Hodge conjecture is about projective non-singular complex algebraic varieties. It characterizes the cohomology classes coming from algebraic cycles. I will explain these terms, tell why the conjecture is so hard to attack, and why we care.