In this article, we study a family of subgraphs of the Farey graph, denoted as ℱN for every N ∈ ℕ. We show that ℱN is connected if and only if N is either equal to one or a prime power. We introduce a class of continued fractions referred to as ℱN -continued fractions for each N > 1. We establish a relation between ℱN-continued fractions and certain paths from infinity in the graph ℱN. Using this correspondence, we discuss the existence and uniqueness of ℱN-continued fraction expansions of real numbers.
G. A. Jones, D. Singerman, and K. Wicks. The modular group and generalized Farey graphs. LMS Lect. Note Ser, 160:316–338, 1991.
Oleg Karpenkov. Geometry of Continued Fractions. Springer, 2013.
C. Kraaikamp. A new class of continued fraction expansions. Acta Arithmetica, LVII:1–39, 1991.
S. Kushwaha. Pell equation: A revisit through ℱ 2 l-continued fractions. Integers, 20(A):A9(1–10), 2020.
S. Kushwaha and R. Sarma. Continued fractions arising from ℱ1,3. Ramanujan J., 46:605–631, 2018.
O. Perron. Die Lehre von den Kettenbrücheni, volume I. Springer Fachmedien Wiesbaden GmbH, 1977.
R. Sarma and S. Kushwaha. On finite semi-regular continued fractions. Integers, 16-A45:1–11, 2016.
R. Sarma, S. Kushwaha, and R. Krishnan. Continued fractions arising from ℱ1,2. J. Number Theory, 154:179–200, 2015.
F. Schweiger. Continued fractions with odd and even partial quotients. Arbeitsberichte Math. Institut Universität Salzburg, 4:59–70, 1982.
F. Schweiger. On the approximation by continued fractions with odd and even partial quo-tients. Arbeitsberichte Math. Institut Universität Salzburg, 1–2:105–114, 1984.