Last Update: 3 November 2010
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is a relation, but is not a function.
will be called a "1–1" function
is a function, but is not a "1–1" function.
(It's a "2–1" function.)
f : A → B | A is like an archer; B is like a target. |
function: | no archer hits >1 target |
partial function: | some archer lacks arrows |
total function: | every archer has arrows |
1–1 function: | every archer hits a different target |
onto function: | every target is hit by some archer. |