The groupoids of Mersenne, Fermat, Cullen, Woodall and other Numbers and their representations by means of integer sequences

Amelia Carolina Sparavigna (1)

1 Polito - Politecnico di Torino = Polytechnic of Turin

In some previous works, we have discussed the groupoids related to the integer sequences of Mersenne, Fermat, Cullen, Woodall and other numbers. These groupoid possess different binary operators. As we can easily see, other integer sequences can have the same binary operators, and therefore can be used to represent the related groupoids. Using the On-Line Encyclopedia of Integer Sequences (OEIS), we can also identify the properties of these representations of groupoids. At the same time, we can also find integer sequences not given in OEIS and probably not yet studied.

Mots clés: Groupoids; Integer Sequences

Domaines: Mathématiques [math]; Théorie des nombres [math.NT]

Amelia Carolina Sparavigna. The groupoids of Mersenne, Fermat, Cullen, Woodall and other Numbers and their representations by means of integer sequences. 2019. ⟨hal-02305253⟩