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OPEN - $500
Let $A\subset \mathbb{N}$ be a finite Sidon set. Is there some set $B$ with $A\subseteq B$ which is
perfect difference set
modulo $p^2+p+1$ for some prime $p$?
#707
:
[Er81]
[Er85c]
[Er91]
additive combinatorics
,
sidon sets
See also
[44]
and
[329]
.
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