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sav08:relations [2008/02/21 20:13] piskac |
sav08:relations [2008/02/21 20:14] piskac |
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* <latex>r \circ (s \cap t) \subseteq (r \circ s) \cap (r \circ t)</latex> | * <latex>r \circ (s \cap t) \subseteq (r \circ s) \cap (r \circ t)</latex> | ||
- <latex>(r \circ s) \cap (r \circ t) \subseteq r \circ (s \cap t)</latex> | - <latex>(r \circ s) \cap (r \circ t) \subseteq r \circ (s \cap t)</latex> | ||
- | - <latex>(r \circ s)^{-1} = </latex> | + | - <latex>(r \circ s)^{-1} = s^{-1} \circ r^{-1}</latex> |
__Solution:__ | __Solution:__ |