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Topic: Prove Hardy's Theorem (Read 6629 times) |
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immanuel78
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Prove Hardy's Theorem
« on: Dec 5th, 2007, 10:07pm » |
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If f is anaytic on B(0;R) and not constant then I(r)=( 1/(2*pi) ) int[ from 0 to 2*pi ] |f( r*exp(i*t) )| dt is strictly increasing and log I(r) is a convex function of log r.
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« Last Edit: Dec 6th, 2007, 2:59am by immanuel78 » |
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