学术报告（胡毅 2026.6.2）

摘要：In initial thinking, describing singularities by equations appears to require collections of polynomials of arbitrary degree and form with no intrinsic relations among them. In his work on the surgery of Grassmannians, Laurent Lafforgue provided a remarkable framework in which only linear and quadratic equations are needed, and more importantly these simple polynomials are structurally well organized through the Plücker relations. Building on Lafforgue’s works, themselves rooted in Nikolai Mnev’s universality theorem, we further transform these equations into even simpler forms: linearized Plücker relations and binomials, which we call universal equations for singularities. We will discuss why these simple and highly organized universal relations naturally arise, and how they can be applied in algebraic geometry.