Let E/Q be an elliptic curve. We consider finite sequences of rational points \P₁, , PN\ whose x-coordinates form an arithmetic progression in Q. Under the assumption of Lang's conjecture on lower bounds for canonical height functions, we prove that the length N of such sequences satisfies the upper bound Aʳ, where A is an absolute constant and r is the Mordell-Weil rank of E/Q. Furthermore, assuming the uniform boundedness of ranks of elliptic curves over Q, the length N satisfies a uniform upper bound independent of E.
S. L. G. Choi (Sat,) studied this question.
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