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Diophantine equation

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Let R be a PID. Consider the Diophantine equation ax+by=N where a,b and N are integers and a,b are nonzero. Suppose x_0, y_0 is a solution: ax_0+by_0=N. Prove that the full set of solutions to this equation is given by

x = x_0 + (mb/gcd(a,b))
y = y_0 - (ma/gcd(a,b))

as m ranges over the integers.

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Solution Summary

This provides an example of a proof regarding a Diophantine equation.

Solution Preview

Proof:
Since (x_0, y_0) is a solution, then
ax_0 + by_0 = N (1)
Now we consider a general solution (x, y), then
ax + by = N (2)
(2) - (1), we get
...

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