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For questions about sequences of integers. References are often made to the online resource oeis.org.

14 votes
1 answer
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Put as many points as possible in an equilateral triangle of side 1 with their minimal dista...

It is known by the pigeon-hole principle that: If we select $5$ points within an equilateral triangle with side $1$, there must be at least two whose distance apart is less than or equal to $1/2$. A …
Fei Gao's user avatar
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