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22
P 22
P 22
Source:
May 25, 2007
Additive Number Theory
Problem Statement
Show that an integer can be expressed as the difference of two squares if and only if it is not of the form
4
k
+
2
(
k
∈
Z
)
4k+2 \; (k \in \mathbb{Z})
4
k
+
2
(
k
∈
Z
)
.
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