When I read Hamilton's 'FOUR-MANIFOLDS WITH POSITIVE CURVATURE OPERATOR',I am curious the details about Karen Uhlenbeck trick. But I can't find suitable reference to read it . What should I read about this trick ?
2026-03-25 20:41:33.1774471293
Reference about Karen Uhlenbeck
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In "The Ricci Flow in Riemannian Geometry" by Andrews and Hopper, it is also called Unlenbeck's trick, see chapter 6 in that book.