On the computational complexity of determining the solvability or unsolvability of the equation $X\sp{2}-DY\sp{2}=-1$
Lagarias, J. C.Volume:
260
Language:
english
Journal:
Transactions of the American Mathematical Society
DOI:
10.1090/S0002-9947-1980-0574794-0
Date:
February, 1980
File:
PDF, 2.08 MB
english, 1980