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reversed_relation [2013/05/18 12:56] 127.0.0.1 external edit |
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| - | ===== Reversed relation ===== | ||
| - | ==== Definition ==== | ||
| - | | $ R $ | | ||
| - | | $ \forall_R c\ \exists a,b\ (c=\langle a,b\rangle) $ | | ||
| - | |||
| - | ^ $ \langle x,y \rangle \in R^\smile $ ^ | ||
| - | |||
| - | ^ $ \langle y,x \rangle \in R $ ^ | ||
| - | |||
| - | ==== Ramifications ==== | ||
| - | === Reference === | ||
| - | Mizar files: [[http://markun.cs.shinshu-u.ac.jp/mirror/mizar/JFM/Vol1/relat_1.html|RELAT_1]] | ||
| - | |||
| - | ==== Context ==== | ||
| - | Set constructor | ||
| - | === Parents === | ||
| - | [[Ordered pair]] | ||
