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PEN K Problems
13
K 13
K 13
Source:
May 25, 2007
function
Functional Equations
Problem Statement
Find all functions
f
:
Z
→
Z
f: \mathbb{Z}\to \mathbb{Z}
f
:
Z
→
Z
such that for all
m
∈
Z
m\in \mathbb{Z}
m
∈
Z
:
f
(
f
(
m
)
)
=
m
+
1.
f(f(m))=m+1.
f
(
f
(
m
))
=
m
+
1.
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