Geodesic
Ball's lemma as an exercise
Čebyševskij sbornik, Tome 22 (2021) no. 3, pp. 464-466

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We suggest an extremely short proof of Ball's lemma by means of harmonic analysis only.
Keywords: Ball's lemma, Fourier transform, Hausdorff–Young inequality, Babenko–Beckner constant. 
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     author = {E. Liflyand},
     title = {Ball's lemma as an exercise},
     journal = {\v{C}eby\v{s}evskij sbornik},
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     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CHEB_2021_22_3_a30/}
}
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E. Liflyand. Ball's lemma as an exercise. Čebyševskij sbornik, Tome 22 (2021) no. 3, pp. 464-466. http://geodesic.mathdoc.fr/item/CHEB_2021_22_3_a30/