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Search: MSC category 11N25 ( Distribution of integers with specified multiplicative constraints )

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1. CMB 2012 (vol 56 pp. 695)

Banks, William D.; Güloğlu, Ahmet M.; Yeager, Aaron M.
Carmichael meets Chebotarev
For any finite Galois extension $K$ of $\mathbb Q$ and any conjugacy class $C$ in $\operatorname {Gal}(K/\mathbb Q)$, we show that there exist infinitely many Carmichael numbers composed solely of primes for which the associated class of Frobenius automorphisms is $C$. This result implies that for every natural number $n$ there are infinitely many Carmichael numbers of the form $a^2+nb^2$ with $a,b\in\mathbb Z $.

Keywords:Carmichael numbers, Chebotarev density theorem
Categories:11N25, 11R45

2. CMB 2009 (vol 53 pp. 204)

3. CMB 2009 (vol 52 pp. 3)

Banks, W. D.
Carmichael Numbers with a Square Totient
Let $\varphi$ denote the Euler function. In this paper, we show that for all large $x$ there are more than $x^{0.33}$ Carmichael numbers $n\le x$ with the property that $\varphi(n)$ is a perfect square. We also obtain similar results for higher powers.

Categories:11N25, 11A25

4. CMB 2008 (vol 51 pp. 172)

Alkan, Emre; Zaharescu, Alexandru
Consecutive Large Gaps in Sequences Defined by Multiplicative Constraints
In this paper we obtain quantitative results on the occurrence of consecutive large gaps between $B$-free numbers, and consecutive large gaps between nonzero Fourier coefficients of a class of newforms without complex multiplication.

Keywords:$B$-free numbers, consecutive gaps
Categories:11N25, 11B05

5. CMB 1998 (vol 41 pp. 335)


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