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Erdős problem 329

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Erdős Problem 329. Let A ⊆ ℕ be a Sidon set. How large can lim sup_{N → ∞} |A ∩ {1,…,N}| / N^{1/2} be?

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Problem row
sha256:1d9734d820d39be9081a58c47538ae47eb9a4559bd26c2c47be5dc651557a6f4
Metadata
sha256:c415747a1c43fb95919f599a60db92c799d8bccd70b3d8efb2c65a5bf44a0533
Observation
sha256:9c8326e865b6017b103af7611c852a06776d81964979b8ab5a1b800cd550dff6
Content
sha256:2467db3d81283bf35eaa5e716e1552a2d253a01da4b6fcd134b0ebf1eda105f5
Repository
sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection
sha256:a4a96441668a9f8b33afbcb3f696a2639f5fae145f36ddc063d7f67d5fb87ce8
Source commit
36c6d0fef71a3fec84d9dcd5eeca4e22e378f7cb
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