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Hermite-Padé approximations to exponential functions and elementary estimates of the measure of irrationality of pi. (English) Zbl 0518.41014
The Riemann problem, complete integrability and arithmetic applications, Proc. Semin., France and USA 1979-1980, Lect. Notes Math. 925, 299-322 (1982).

41A21 Padé approximation
11J70 Continued fractions and generalizations
11J81 Transcendence (general theory)