佩雷尔曼关于庞加莱猜想的论文0211159.pdf

The Ricci flow equation, introduced by Richard Hamilton [H 1], is the evolution equation d gij(t) = −2Rij for a riemannian metric gij(t). In his dt seminal paper, Hamilton proved that this equation has a unique solution for a short time for an arbitrary (smooth) metric on a closed manifold. The ev