【摘 要】
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Using ordered pairs,we can formulate themathematical theory of relations in set-theoreticlanguage.By a relation we mean here something likemarriage (between me
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Using ordered pairs,we can formulate themathematical theory of relations in set-theoreticlanguage.By a relation we mean here something likemarriage (between men and women) or belonging(between elements and sets).Looking at any specific relation,such asmarriage for instance,we might be tempted toconsider certain ordered pairs (x,y),namely justthose for which x is a man,y is a woman,and x ismarried to y.We have not yet seen the definition of
Using ordered pairs, we can formulate themathematical theory of relations in set-theoreticlanguage.By a relation we mean here something likemarriage (between men and women) or belonging (between elements and sets) .Looking at any specific relation, such as marriage for instance, we might be tempted toconsider certain ordered pairs (x, y), that just those for which x is a man, y is a woman, and x ismarried to y.We have not yet seen the definition of
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