Geodesic
About rank of Somos-6
Dalʹnevostočnyj matematičeskij žurnal, Tome 18 (2018) no. 1, pp. 71-74.

Voir la notice de l'article provenant de la source Math-Net.Ru

For theta functions from two variables follows from an addition formula that the rank of the sequence of Somos-6 does not surpass four. In work the example of the sequence of Somos-6 with a rank 4 is constructed. 
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N. V. Markova. About rank of Somos-6. Dalʹnevostočnyj matematičeskij žurnal, Tome 18 (2018) no. 1, pp. 71-74. http://geodesic.mathdoc.fr/item/DVMG_2018_18_1_a8/

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