olymmath

SCHWEITZER 2010 Problem 11

    For problem 11 , i couldn't find the correct translation , so i just posted the hungarian version . If anyone could translate it ,i would be very thankful . [tip=see hungarian]Az XX ́es YY valo ́s ́ert ́eku ̋ v ́eletlen v ́altoz ́ok maxim ́alkorrel ́acio ́ja az f(X)f(X) ́es g(Y)g(Y ) v ́altoz ́ok korrela ́cio ́j ́anak szupr ́emuma az olyan ff ́es gg Borel m ́erheto ̋, R→R\mathbb{R} \to \mathbb{R} fu ̈ggv ́enyeken, amelyekre f(X)f(X) ́es g(Y)g(Y) v ́eges sz ́ora ́su ́. Legyen U a [0,2π][0,2\pi] interval- lumon egyenletes eloszl ́asu ́ val ́osz ́ınu ̋s ́egi v ́altozo ́, valamint n ́es m pozit ́ıv eg ́eszek. Sz ́am ́ıtsuk ki sin⁡(nU)\sin(nU) ́es sin⁡(mU)\sin(mU) maxim ́alkorrela ́ci ́oja ́t. [/tip] Edit:

    Dataset text AI-MO AoPS. Quoted with source.

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