A simple criterion for solvability of both $X^2-D{Y}^2=c$ and $x^2-D{y}^2=-c$.

Mollin, R.A.. "A simple criterion for solvability of both and .." The New York Journal of Mathematics [electronic only] 7 (2001): 87-97. <http://eudml.org/doc/122006>.

@article{Mollin2001,
author = {Mollin, R.A.},
journal = {The New York Journal of Mathematics [electronic only]},
keywords = {quadratic Diophantine equations; systems of simultaneous Diophantine equations},
language = {eng},
pages = {87-97},
publisher = {University at Albany, Deptartment of Mathematics and Statistics},
title = {A simple criterion for solvability of both and .},
url = {http://eudml.org/doc/122006},
volume = {7},
year = {2001},
}

TY - JOUR
AU - Mollin, R.A.
TI - A simple criterion for solvability of both and .
JO - The New York Journal of Mathematics [electronic only]
PY - 2001
PB - University at Albany, Deptartment of Mathematics and Statistics
VL - 7
SP - 87
EP - 97
LA - eng
KW - quadratic Diophantine equations; systems of simultaneous Diophantine equations
UR - http://eudml.org/doc/122006
ER -