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An essay on irrationality measures of pi and other logarithms

Wadim Zudilin

math.NTarXiv:math/0404523

Abstract

We present a brief survey of the methods used in deducing upper estimates for irrationality measures of the logarithm values. We particularly expose the best known estimates for 2 (due to E. Rukhadze), π (due to M. Hata) and 3 (due to G. Rhin).

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