Welcome to the website of the seminar organized by the Differential Geometry groups of Università di Torino and Politecnico di Torino.
For any information, please send an e-mail to dgseminar.torino@gmail.com.
The talks will take place either at the Deparment of Mathematics "G. Peano" (Università di Torino) or at the Department of Mathematical Sciences "G.L. Lagrange" (Politecnico di Torino).
NEXT TALK
27/01/2026, 14.30, Sala S, Department of Mathematics "G. Peano" , Università di Torino.
On the long-time behavior of ancient homogenous Ricci flows
Abstract: Ricci flow solutions that exist for all negative times have special significance and are known as ancient solutions. In this talk, we describe the long-time behavior of ancient solutions to the homogeneous Ricci flow on compact manifolds. In particular, we show that along every blowdown sequence they subconverge smoothly, in an appropriate sense, to the product of an Einstein manifold with positive scalar curvature and a flat factor. This is joint work with A. Krishnan.
28/01/2026, 14.00, Aula Seminari, Department of Mathematical Sciences "G.L. Lagrange" (Politecnico di Torino).
Alessandro Minuzzo (Università di Parma)
Complex Structures on Product Manifolds
Abstract:We generalize the construction of a complex structure on a product of two odd-dimensional spheres from a classical paper by Calabi and Eckmann. More precisely, let M_i, for i = 1,2, be a Kähler manifold, and let G be a compact Lie group acting on M_i by Kähler isometries. Suppose that the action admits a momentum map µ_i and assume that its zero-level set N_i is a regular submanifold of M_i. We define an almost complex structure on the manifold N_1 x N_2 and provide necessary and sufficient conditions for its integrability. In the integrable case, we find explicit holomorphic charts for N_1 x N_2. If time permits, we will also present some applications. This is a joint work with Leonardo Biliotti.
FORTHCOMING TALKS
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