EN
Let $m ∈ ℤ_{>0}$ and a,q ∈ ℚ. Denote by $𝓐𝓟_{m}(a,q)$ the set of rational numbers d such that a, a + q, ..., a + (m-1)q form an arithmetic progression in the Edwards curve $E_d : x² + y² = 1 + dx²y²$. We study the set $𝓐𝓟_{m}(a,q)$ and we parametrize it by the rational points of an algebraic curve.