Differences
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Both sides previous revision Previous revision | Next revision Both sides next revision | ||
unordered_pair [2014/12/05 01:04] nikolaj |
unordered_pair [2015/10/09 15:51] nikolaj |
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| @#FFBB00: definiendum | @#FFBB00: $ x\in \{X,Y\} $ | | | @#FFBB00: definiendum | @#FFBB00: $ x\in \{X,Y\} $ | | ||
| @#55EE55: postulate | @#55EE55: $ x = X \lor x = Y $ | | | @#55EE55: postulate | @#55EE55: $ x = X \lor x = Y $ | | ||
- | ==== Discussion ==== | + | |
+ | ----- | ||
+ | $\{X,Y\} \equiv \{x \mid x = X \lor x = Y\}$ | ||
+ | |||
+ | === Discussion === | ||
=== Reference === | === Reference === | ||
Wikipedia: [[http://en.wikipedia.org/wiki/Axiom_of_pairing|Axiom of pairing]] | Wikipedia: [[http://en.wikipedia.org/wiki/Axiom_of_pairing|Axiom of pairing]] | ||
- | ==== Parents ==== | + | |
+ | ----- | ||
=== Context === | === Context === | ||
[[Sets]] | [[Sets]] |