Ricci Flow Solution Poincaré Conjecture (Geometry) Tie

No need to be a mathematician or physicist or topologist to enjoy any of these gifts featuring the Ricci flow, a kind of nonlinear diffusion equation. For the record, the Ricci flow (named after Gregorio Ricci-Curbastro) was introduced by Richard Hamilton in 1981 in order to gain insight into the geometrisation conjecture of William Thurston, which concerns the topological classification of three-dimensional smooth manifolds. The Ricci flow plays an important role in Grigori Perelman's solution of the Poincaré conjecture. Memorable geometric gifts for any fan of geometric flows!