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idempotent_function [2014/02/08 18:32] nikolaj |
idempotent_function [2014/03/21 11:11] (current) |
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| ===== Idempotent function ===== | ===== Idempotent function ===== | ||
| ==== Set ==== | ==== Set ==== | ||
| - | | @#88DDEE: $X,Y$ ... set | | + | | @#55CCEE: context | @#55CCEE: $X$ ... set | |
| - | | @#FFBB00: $ f\in \mathrm{it}(X,Y) $ | | + | | @#FFBB00: definiendum | @#FFBB00: $ f\in \mathrm{it}(X) $ | |
| - | | @#55EE55: $ f:X\to Y $ | | + | | @#55EE55: postulate | @#55EE55: $ f:X\to X $ | |
| - | | @#55EE55: $ f\circ f=f $ | | + | | @#55EE55: postulate | @#55EE55: $ f\circ f=f $ | |
| ==== Discussion ==== | ==== Discussion ==== | ||
| ==== Parents ==== | ==== Parents ==== | ||
| === Subset of === | === Subset of === | ||
| - | [[Function]] | + | [[Unary operation]] |
