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reversed_relation [2013/05/17 22:13] nikolaj |
reversed_relation [2013/05/21 11:00] nikolaj |
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===== Reversed relation ===== | ===== Reversed relation ===== | ||
==== Definition ==== | ==== Definition ==== | ||
- | | $ R $ | | + | | $ R\in\text{Rel}(X,Y) $ | |
- | + | ||
- | | $ \forall_R c\ \exists a,b\ (c=\langle a,b\rangle) $ | | + | |
^ $ \langle x,y \rangle \in R^\smile $ ^ | ^ $ \langle x,y \rangle \in R^\smile $ ^ | ||
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==== Context ==== | ==== Context ==== | ||
Set constructor | Set constructor | ||
- | === Follows === | + | === Parents === |
- | [[Ordered pair]] | + | [[Binary relation]] |