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| | function |
 | | boolean function, constant function, unary function, binary function, trinary function, n-ary function, total function. |
 | | The inverse of a function, a mapping from the function's outputs to its inputs, may be a relation rather than another function. |
 | | Since a function must return the same value for each input and the input cannot change (since it has no arguments), it must always return the same value. |
| www.nist.gov /dads/HTML/function.html (294 words) |
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