Browsing Mathematics publications (MU) by Subject "Asymptotic expansions"
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(Polish Academy of Sciences, Institute of Mathematics, 2005)Let '(•) and _(•) denote the Euler function and the sum of divisors function, respectively. In this paper, we give a lower bound for the number of m ≤ x for which the equation m = _(n)−n has no solution. We also show that ...