1Instituto de Matemáticas Universidad Nacional Autónoma de México C.P. 58180, Morelia, Michoacán, México 2Department of Mathematics University of Ottawa 585 King Eward Street Ottawa, Ontario, Canada
Colloquium Mathematicum, Tome 100 (2004) no. 1, pp. 91-93
We show that there exist infinitely many positive integers $r$ not of the form $(p-1)/2-\phi (p-1)$, thus providing an affirmative answer to a question of Neville Robbins.
Keywords:
there exist infinitely many positive integers form p phi p providing affirmative answer question neville robbins
Affiliations des auteurs :
Florian Luca
1
;
P. G. Walsh
2
1
Instituto de Matemáticas Universidad Nacional Autónoma de México C.P. 58180, Morelia, Michoacán, México
2
Department of Mathematics University of Ottawa 585 King Eward Street Ottawa, Ontario, Canada
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Florian Luca; P. G. Walsh. On the number of nonquadratic residues
which are not primitive roots. Colloquium Mathematicum, Tome 100 (2004) no. 1, pp. 91-93. doi: 10.4064/cm100-1-8
