A Lower Bound for the Class Number of a Real Quadratic Field of ERD-Type
In this paper, we use the Lagrange neighbour and our equivalence theorem for primitive ideals to obtain lower bounds which are sharper than those given in the literature for class numbers of real quadratic fields in general, but applied to greatest advantage when d is of ERD type.
11R 11, 11R09, 11R29, class number, primitive ideal, divisor function, lagrange neighbour, ERD-type, quadratic fields
Mollin, R. A., L-C. Zhang, and Paula Kemp. "A Lower Bound For the Class Number of a Real Quadratic Field of ERD-type." Canadian Mathematical Bulletin 37, no. 1 (1994): 90-96.
Canadian Mathematical Bulletin