Saturday, 25 December 2010

gt.geometric topology - Lipschitz orthonormal frames on submanifolds of mathbfRn ?

You will probably need to require C2 smoothness of your submanifold. Take a simple example of d=1 and the manifold the graph of the function f(x)=xalpha for x>0 and f(x)=0 if xle0. Then for 1<alpha<2, the normal bundle is only Hölder continuous, so no L exists at x=0. Or would you exclude this counterexample for the reason that the exponential map from the normal bundle is not a diffeomorphism onto any ball of radius r>0 at x=0?



Generally, you will probably need to have a bound on the extrinsic curvature, for which C2 and compactness would suffice.

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