Solution

ID: past-exam-of-the-real-and-harmonic-analysis-course-of-the-university-of-oxford/2007/3/e/solution

For each , choose an open arc about of arclength , and put . It contains every point used by every empirical measure, whereas
Thus for all . Let . This is closed and for all . But is irrational, so the weak-star limit is normalized arclength and
Therefore the proposed implication is false. Weak-star convergence tests continuous functions and does not assert convergence of the indicator function of an arbitrary closed set.

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