A continued fraction v(τ) of Ramanujan is evaluated at certain arguments in the field K = Q(\sqrt{-d}), with -d = 1 (mod 8), in which the ideal (2) = P₂ P'₂ is a product of two prime ideals. These values of v(τ) are shown to generate the inertia field of P₂ or P'₂ in an extended ring class field over the field K. The conjugates over Q of these same values, together with 0, -1 ± \sqrt{2}, are shown to form the exact set of periodic points of a fixed algebraic function F(x), independent of d. These are analogues of similar results for the Rogers-Ramanujan continued fraction.

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