terminology - Is there a technical term for a function that takes one argument and returns an object of the same type? -

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i'm considering functions of 1 argument of type t return argument of type t. seem vaguely recall there name sort of function, maybe homo-something. there such term?

after hour-long wiki-crawl, appears appropriate term "endofunction".

http://en.wikipedia.org/wiki/endomorphism#endofunctions_in_mathematics


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