An explicit lower bound for special values of Dirichlet L-functions

Class number problem for a family of real quadratic fields

“…for any integer m. In [La] and [BK1], there are similar results to Theorem 1.2 for subfamilies of narrow Richaud-Degert type. However, [La,Theorem 1.2] does not get an explicit lower bound and [BK1, Theorem 1.6] is less effective.…”