Even

an Integer is called ''even'' if it is Divisible by Two ; see Even And Odd Numbers

a Function ''f'' defined on the Real Number s is called ''even'' if ''f''(''x'') = ''f''(−''x'') for all ''x''; see Even And Odd Functions

a Permutation of a finite set is called ''even'' if it can be written as a composition of an even number of Transpositions ; see Even And Odd Permutations

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