On the lower order (R) of an entire Dirichlet series
Annales de l'Institut Fourier, Tome 24 (1974) no. 1, pp. 123-129.

Des estimations λ de l’ordre inférieur (R) d’une série de Dirichlet

f ( s ) = n = 1 a n e s λ n

ont été obtenues en fonction des suites {a n } et {λ n }.

Ces estimations améliorent considérablement celles obtenues précédemment par Rahman (Quart. J. Math. Oxford, (2), 7, 96-99 (1956)), Juneja et Singh (Math. Ann., 184 (1969), 25-29 ).

The estimations of lower order (R) λ in terms of the sequences {a n } and {λ n } for an entire Dirichlet series f(s)= n=1 a n e sλn , have been obtained, namely :

λ = max { λ n p } lim inf p λ n p log λ n p - 1 log | a n p | - 1 = max { λ n p } lim inf p ( λ n p - λ n p - 1 ) log λ n p - 1 log | a n p - 1 | a n p | .

One of these estimations improves considerably the estimations earlier obtained by Rahman (Quart. J. Math. Oxford, (2), 7, 96-99 (1956)) and Juneja and Singh (Math. Ann., 184(1969), 25-29 ).

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     title = {On the lower order $(R)$ of an entire {Dirichlet} series},
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Jain, P. K.; Jain, D. R. On the lower order $(R)$ of an entire Dirichlet series. Annales de l'Institut Fourier, Tome 24 (1974) no. 1, pp. 123-129. doi : 10.5802/aif.494. http://www.numdam.org/articles/10.5802/aif.494/

[1] Alfred Gray and S.M. Shah, Asymptotic values of Holomorphic Functions of irregular growth, Bull. Amer. Math. Soc., 5, 71 (1965), 747-749. | MR | Zbl

[2] Alfred Gray and S.M. Shah, Holomorphic Functions with Gap Power Series, Math. Zeit, 86 (1965), 375-394. | MR | Zbl

[3] Alfred Gray and S.M. Shah, Holomorphic Functions with Gap Power Series, (II), Math. Anal. and Appl. 2, 13, (1966). | Zbl

[4] O.P. Juneja and Prem Singh, On the Lower order of an entire function defined by Dirichlet series, Math. Ann. 184 (1969), 25-29. | MR | Zbl

[5] P.K. Kamthan, On entire functions represented by Dirichlet series (IV), Ann. Inst. Fourier, Grenoble, 16, 2 (1966), 209-223. | Numdam | MR | Zbl

[6] Q.I. Rahman, On the lower order of entire functions defined by Dirichlet series. Quart. J. Math. Oxford (2), 7 (1956), 96-99. | MR | Zbl

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