# Differences

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surjective_function [2014/10/29 19:53] nikolaj |
surjective_function [2014/10/29 19:53] (current) nikolaj |
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==== Discussion ==== | ==== Discussion ==== | ||

A function can only be or not be surjective w.r.t. to a stated codomain. A function is always surjective w.r.t. it's own image. See [[Function]] for further discussion. | A function can only be or not be surjective w.r.t. to a stated codomain. A function is always surjective w.r.t. it's own image. See [[Function]] for further discussion. | ||

- | === Predicates === | + | |

- | | @#EEEE55: predicate | @#EEEE55: $Y$ ... countable $\equiv \mathrm{Surjective}(\mathbb{N},Y)\neq\emptyset$ | | + | |

==== Parents ==== | ==== Parents ==== | ||

=== Subset of === | === Subset of === |