Geodesic
Arithmetic progressions on conics
Journal of integer sequences, Tome 20 (2017) no. 2.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Summary: In this paper, we look at long arithmetic progressions on conics. By an arithmetic progression on a curve, we mean the existence of rational points on the curve whose $x$-coordinates are in arithmetic progression. We revisit arithmetic progressions on the unit circle, constructing 3-term progressions of points in the first quadrant containing an arbitrary rational point on the unit circle. We also provide infinite families of 3-term progressions on the unit hyperbola, as well as conics $ax^{2} + cy^{2} = 1$ containing arithmetic progressions as long as 8 terms.
Classification : 11B25, 11D09
Keywords: arithemetic progression, conic 
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     author = {Ciss, Abdoul Aziz and Moody, Dustin},
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Ciss, Abdoul Aziz; Moody, Dustin. Arithmetic progressions on conics. Journal of integer sequences, Tome 20 (2017) no. 2. http://geodesic.mathdoc.fr/item/JIS_2017__20_2_a6/