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A STUDY ON PELL EQUATION

Abstract

Pell equation (alternatively called the Pell- Fermat equation) is a

type of a Diophantine equation of the form 2 -Dye 2 =1 for a natural number

D. If D is a perfect square, then pell equation can be rewritten as

y).(x+√y) = 1.similarly, the trivial solution (x,y) = (0,1)

is not very interesting. Therefore it is often assumed that D is not a square

and only nontrivial solution (non zero pairs of integers) are considered.

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