Differences
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intersection [2014/04/01 16:37] nikolaj |
intersection [2014/04/03 22:41] nikolaj |
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| ===== Intersection ===== | ===== Intersection ===== | ||
| ==== Set ==== | ==== Set ==== | ||
| - | | @#55CCEE: context | @#55CCEE: $X,Y$ | | + | | @#55CCEE: context | @#55CCEE: $X,Y\in\mathfrak U$ | |
| | @#FFBB00: definiendum | @#FFBB00: $ x\in X \cap Y $ | | | @#FFBB00: definiendum | @#FFBB00: $ x\in X \cap Y $ | | ||
| | @#55EE55: postulate | @#55EE55: $ x\in X \cap Y \Leftrightarrow (x\in X\land x\in Y) $ | | | @#55EE55: postulate | @#55EE55: $ x\in X \cap Y \Leftrightarrow (x\in X\land x\in Y) $ | | ||
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| ==== Parents ==== | ==== Parents ==== | ||
| === Element of === | === Element of === | ||
| - | [[Set]] | + | [[Set universe]] |
| - | === Requirements === | + | === Context* === |
| - | [[Set theory]] | + | [[Set universe]] |
