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solution_set [2016/05/19 20:58]
nikolaj
solution_set [2016/05/20 08:58]
nikolaj
Line 4: Line 4:
 | @#55CCEE: context ​    | @#55CCEE: $ \langle Y,y_0 \rangle $ ... pointed set | | @#55CCEE: context ​    | @#55CCEE: $ \langle Y,y_0 \rangle $ ... pointed set |
 | @#55CCEE: context ​    | @#55CCEE: $ f:X\to Y $ | | @#55CCEE: context ​    | @#55CCEE: $ f:X\to Y $ |
-| @#FFBB00definiendum ​| @#FFBB00: $ x \in$ it | +| @#FF9944definition  ​| @#FF9944: $ S := \{x\mid f(x)=y_0\}$ |
-| @#55EE55: postulate ​  | @#55EE55: $ f(x)=y_0 $ |+
  
 ----- -----
-This is also written ​$f^{-1}(\{y_0\})$, with $f^{-1}:​{\mathcal P}Y\to{\mathcal P}X$.+$S=f^{-1}(\{y_0\})$ ​where $f^{-1}:​{\mathcal P}Y\to{\mathcal P}X$.
  
 === Reference === === Reference ===
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