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On a binary recurrent sequence of polynomials

Reinhardt Euler, Luis H. Gallardo, Florian Luca (2014)

Communications in Mathematics

In this paper, we study the properties of the sequence of polynomials given by g 0 = 0 , g 1 = 1 , g n + 1 = g n + Δ g n - 1 for n 1 , where Δ 𝔽 q [ t ] is non-constant and the characteristic of 𝔽 q is 2 . This complements some results from R. Euler, L.H. Gallardo: On explicit formulae and linear recurrent sequences, Acta Math. Univ. Comenianae, 80 (2011) 213-219.

On a certain class of arithmetic functions

Antonio M. Oller-Marcén (2017)

Mathematica Bohemica

A homothetic arithmetic function of ratio K is a function f : R such that f ( K n ) = f ( n ) for every n . Periodic arithmetic funtions are always homothetic, while the converse is not true in general. In this paper we study homothetic and periodic arithmetic functions. In particular we give an upper bound for the number of elements of f ( ) in terms of the period and the ratio of f .

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