2012 USAMO Problems/Problem 4
Problem
Find all functions 
(where 
is the set of positive integers) such that 
for all positive integers 
and such that 
divides 
for all distinct positive integers 
, .
Solution
See also
| 2012 USAMO (Problems • Resources) | ||
| Preceded by Problem 3 |
Followed by Problem 5 | |
| 1 • 2 • 3 • 4 • 5 • 6 | ||
| All USAMO Problems and Solutions | ||
