Geodesic
The Second Mean Values of Entire Functions
Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 1113-1120

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

Let f(z) be an entire function of the complex variable z = x + iy defined by the everywhere absolutely convergent Dirichlet series 1.1 If then log m(x,f) is an increasing convex function of x (2), and is called the Ritt order of f(z). 
Rahman, Q. I. The Second Mean Values of Entire Functions. Canadian journal of mathematics, Tome 18 (1966) no. 1, pp. 1113-1120. doi: 10.4153/CJM-1966-112-8
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