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A history of Greek mathematics - Wilbourhall.org

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INDETERMINATE ANALYSIS 491<br />

IV. 33. x + -y = m (y — -y)> y + -x = n(x — -xy<br />

[Dioph. assumes y = 1.]<br />

(vi)<br />

Indeterminate equations <strong>of</strong> the first degree.<br />

Lemma to IV. 34. xy + (x-\-y) = a.<br />

., „ IV. 35. xy—(x + y) = n, that a + m?i should be > n 2 .]<br />

II. 15 = III. 20. x + y = a, z 2 — x = u 2 , z 2 — y = v 2 .<br />

[The solution is similar, and a similar remark applies<br />

to Diophantus's implied condition.]

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