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On a quartic diophantine equation

Published online by Cambridge University Press:  20 January 2009

R. J. Stroeker
Affiliation:
Econometric InstituteErasmus UniversityP.O. Box 17383000 Dr RotterdamThe Netherlands E-mail address: stroeker@wis.few.eur.nl, dweger@wis.few.eur.nl
B. M. M. De Weger
Affiliation:
Econometric InstituteErasmus UniversityP.O. Box 17383000 Dr RotterdamThe Netherlands E-mail address: stroeker@wis.few.eur.nl, dweger@wis.few.eur.nl
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Abstract

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In this paper we consider the quartic diophantine equation 3(y2 – 1) = 2x2(x2 – 1) in integers x and y. We show that this equation does not have any other solutions (x, y) with x≧0 than those given by x = 0,1,2,3,6,91. Two approaches are emphasized, one based on diophantine approximation techniques, the other depends on the structure of certain quartic number fields.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1996

References

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