On the range of Carmichael's universal-exponent function

Abstract

Let $\lambda $ denote Carmichael's function, so $\lambda (n)$ is the universal exponent for the multiplicative group modulo $n$. It is closely related to Euler's $\varphi $-function, but we show here that the image of $\lambda $ is much denser than the im

Locations

• Acta Arithmetica - View - PDF