JP JOURNAL OF ALGEBRA NUMBER THEORY AND APPLICATIONS, sa.1, ss.41-47, 2009 (ESCI)
In this paper, we revisit the relations between the fundamental units' coefficients of the real quadratic fields K = Q(root D) and convergents of the continued fraction expansions of W-D. Furthermore, we provide a theorem and obtain some new results on the class numbers of K = Q(root D) by using solvability of the equation x(2) - Dy-2 = sigma(2) and the relations mentioned above.