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The result as stated is clearly wrong! Take a measure mu of mass epsilon supported on a circle of radius r. Then the potential of mu is arbitrarily small on close to the circle. Now choose H such that the circle cannot be covered by circles whose radius sums up to < 5 H. (something like H = pi r/5 should work).
Is there an easy way to revert it to the old version? Thanks... — Preceding unsigned comment added by SunbathingFrog (talk • contribs) 20:57, 2 June 2010 (UTC)
- Which version is correct ? Give the time and date, and I'll revert it, but my mathematical skills are too limited to understand the problem myself. Thanks Claritas § 21:46, 2 June 2010 (UTC)
Would a See Also including Cartan's lemma make sense? — Preceding unsigned comment added by 138.16.112.239 (talk) 19:05, 29 April 2017 (UTC)