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reversed_relation [2013/05/17 22:13]
nikolaj
reversed_relation [2013/05/21 11:00]
nikolaj
Line 1: Line 1:
 ===== 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 $ ^
Line 15: Line 13:
 ==== Context ==== ==== Context ====
 Set constructor Set constructor
-=== Follows ​=== +=== Parents ​=== 
-[[Ordered pair]]+[[Binary relation]]
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