Ricci flow and the holonomy group

Details Ricci flow and the holonomy group Ricci flow and the holonomy group

2011-05-18

arxiv.org/abs/1105.3722v1

Mathematics

Differential Geometry

26 pages

Scientific paper

We prove that the restricted holonomy group of a complete smooth solution to the Ricci flow of uniformly bounded curvature cannot spontaneously contract in finite time; it follows, then, from an earlier result of Hamilton that the holonomy group is exactly preserved by the equation. In particular, a solution to the Ricci flow may be K\"{a}hler or locally reducible (as a product) at $t= T$ if and only if the same is true of $g(t)$ at times $t\leq T$.

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