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Getting Maps In 2080 (Posted on 2007-08-17) Difficulty: 4 of 5
Let S = {1; 2; 3; 4; 5; 6; 7}

Analytically determine the number of maps f from S to S such that f2080(x) = x for every x belonging to S.

Note: The iteration is denoted by the superscript, such that f1(x) = f(x) and
fn(x) = f(fn-1(x)) for all n > 1.

See The Solution Submitted by K Sengupta    
Rating: 4.3333 (3 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionone case missing--computer lists all combinationsCharlie2007-08-20 10:36:24
re(2): solutionCharlie2007-08-18 01:14:24
Some Thoughtsre: solutionFederico Kereki2007-08-17 18:44:22
SolutionsolutionCharlie2007-08-17 15:34:40
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