Geodesic
An Upper Limit Property of the Euler Function
Canadian mathematical bulletin, Tome 23 (1980) no. 3, pp. 375-377

Voir la notice de l'article provenant de la source Cambridge University Press

If φ(n) denotes the Euler function, for n = p a prime we have φ(n)/n = (1-1/p), which implies that In this note we consider a refinement of this result. Namely, we prove that 1 where P∗(k) is the largest integer of the form where p1 < p2<...<pr are the first r primes in ascending order. 
Hausman, Miriam. An Upper Limit Property of the Euler Function. Canadian mathematical bulletin, Tome 23 (1980) no. 3, pp. 375-377. doi: 10.4153/CMB-1980-056-1
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[1] 1. Hardy, G. H., and Wright, E. M., An Introduction to the Theory of Numbers, Oxford University Press, 1968, p. 351. Google Scholar

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