Về các phổ Lagrange bậc hai không arkhimede trong các trường số
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#Diophantine approximation; nonarchimedean fields; Lagrange spectrum; quadratic irrationals; Bruhat-Tits treesTài liệu tham khảo
Bass, H., Lubotzky, A.: Tree Lattices. Prog. Math. 176, Birkhäuser, (2001)
Berthé, V., Nakada, H.: On continued fraction expansions in positive characteristic: equivalence relations and some metric properties. Expo. Math. 18, 257–284 (2000)
Khinchin, A.Y.: Continued Fractions. Chicago University Press (1964)
Serre, J.-P.: Arbres, amalgames, \(\text{SL}_2\). 3ème éd. corr., Astérisque 46, Soc. Math. France, (1983)