Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
solution_set [2016/05/19 20:56] nikolaj |
solution_set [2016/05/20 08:58] (current) 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 $ | | ||
- | | @#FFBB00: definiendum | @#FFBB00: $ x \in$ it | | + | | @#FF9944: definition | @#FF9944: $ S := \{x\mid f(x)=y_0\}$ | |
- | | @#55EE55: postulate | @#55EE55: $ f(x)=y_0 $ | | + | |
----- | ----- | ||
- | This is just $f^{-1}(\{y_0\})$. | + | $S=f^{-1}(\{y_0\})$ where $f^{-1}:{\mathcal P}Y\to{\mathcal P}X$. |
=== Reference === | === Reference === |