An estimate is given of the size of a positive integer solution $n$ of the inequality $phi(an+b)<phi(an)$, $gcd(a,b)=1$. Experiments indicate that this gives a useful indication of the size of the {em minimal} solution.

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Cornell University Library
arXiv.org e-Print archive
Scientific Computing

te Riele, H.J.J. (2001). On the size of solutions of the inequality ø(ax+b)<ø(ax). arXiv.org e-Print archive. Cornell University Library .