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math.NT2021
A group-theoretical approach to Lehmer's totient problem
Manuel Norman
Lehmer's totient problem asks whether there exists any composite number such that , where is Euler totient function. It is known that if any such …
math.CV2021
On the critical points of entire functions
Manuel Norman
Several years ago, Aziz and Zargar, while considering some questions related to Sendov's conjecture, solved a problem posed by Brown (see [1,2]), showing that any complex polynomia…