Soit φ la fonction indicatrice d'Euler, et P un polynôme unitaire à coefficients entiers et de degré strictement positif. En combinant les techniques de démonstration de notre précédent article et celles d'un article récent de Hernández et Luca, nous généralisons le résultat suivant de Hernández et Luca : l'ensemble des entiers n strictement positifs composés tels que et , est fini. La généralisation est quantitative, et s'applique aussi à l'analogue unitaire du problème de Lehmer (antérieurement étudié par Subbarao et Siva Rama Prasad).
Let φ denote the Euler totient function, and let P be a monic polynomial with integer coefficients and positive degree. Combining the techniques of proof from our previous paper and that of a recent paper by Hernández and Luca we generalize the following result of Hernández and Luca: the set of composite positive integers n such that and is finite. The generalization is of the quantitative type, and applies also to the so-called unitary analogue of the Lehmer problem (studied earlier by Subbarao and Siva Rama Prasad).
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@article{CRMATH_2009__347_19-20_1111_0, author = {W\'ojtowicz, Marek and Skonieczna, Marta}, title = {Appendix to the {Note} {{\textquotedblleft}The} structure of the set of numbers with the {Lehmer} property{\textquotedblright}}, journal = {Comptes Rendus. Math\'ematique}, pages = {1111--1114}, publisher = {Elsevier}, volume = {347}, number = {19-20}, year = {2009}, doi = {10.1016/j.crma.2009.07.019}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2009.07.019/} }
TY - JOUR AU - Wójtowicz, Marek AU - Skonieczna, Marta TI - Appendix to the Note “The structure of the set of numbers with the Lehmer property” JO - Comptes Rendus. Mathématique PY - 2009 SP - 1111 EP - 1114 VL - 347 IS - 19-20 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2009.07.019/ DO - 10.1016/j.crma.2009.07.019 LA - en ID - CRMATH_2009__347_19-20_1111_0 ER -
%0 Journal Article %A Wójtowicz, Marek %A Skonieczna, Marta %T Appendix to the Note “The structure of the set of numbers with the Lehmer property” %J Comptes Rendus. Mathématique %D 2009 %P 1111-1114 %V 347 %N 19-20 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2009.07.019/ %R 10.1016/j.crma.2009.07.019 %G en %F CRMATH_2009__347_19-20_1111_0
Wójtowicz, Marek; Skonieczna, Marta. Appendix to the Note “The structure of the set of numbers with the Lehmer property”. Comptes Rendus. Mathématique, Tome 347 (2009) no. 19-20, pp. 1111-1114. doi : 10.1016/j.crma.2009.07.019. http://www.numdam.org/articles/10.1016/j.crma.2009.07.019/
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