# partial function

## English

### Noun

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Wikipedia partial function (plural partial functions)

1. (mathematics) A function whose domain is a subset of some set

### Usage notes

This is not a formal term, but a metamathematical description which only assumes concrete meaning in context. For example, in computability theory, a partial function is a function whose domain is a subset of ${\N}^k$ for some k, but in other fields the term has other meanings.