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Erdős problem 502

What is the size of the largest A⊆RnA\subseteq \mathbb{R}^n such that there are only two distinct distances between elements of AA? That is, #{∣x−y∣:x≠y∈A}=2.\# \{ \lvert x-y\rvert : x\neq y\in A\} = 2.

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Exact provenance

Problem row
sha256:8ace8961873d25243b041646fa3ff58d82792831aeb7b899fa84ce3fc37f0517
Metadata
sha256:2cdc85c213528924aad12e12aca85b699212134df370b938e40da6cf6f590938
Observation
sha256:9c8326e865b6017b103af7611c852a06776d81964979b8ab5a1b800cd550dff6
Content
sha256:ab6b1783d100ddd4cb0ff1ccea31d1164c907d292741874b410f425a302cb43f
Repository
sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection
sha256:a4a96441668a9f8b33afbcb3f696a2639f5fae145f36ddc063d7f67d5fb87ce8
Source commit
36c6d0fef71a3fec84d9dcd5eeca4e22e378f7cb