Let be a set. An operation on is a function from a power of into . More precisely, given an ordinal number , a function from into is an -ary operation on . If is a finite ordinal, then the -ary operation is a finitary operation on .
Operation
See also
Operator, PrecedenceThis entry contributed by Matt Insall (author's link)
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Insall, Matt. "Operation." From MathWorld--A Wolfram Web Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/Operation.html