TheoremBase

Characteristic Property of the Ordered Pair

Statement

Let xx, yy, x′x' and y′y' be objects, and let ordered pairs be those of Ordered Pair. Then

(x,y)=(x′,y′)if and only ifx=x′ and y=y′.(x,y)=(x',y')\qquad\text{if and only if}\qquad x=x'\ \text{and}\ y=y' .

Consequently the first and second components of an ordered pair are uniquely determined by that pair.

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