I found this 2015 research paper (http://unsolvedproblems.org/S75.pdf) that claims it has solved the rational distance problem of a unit square. When I look in other stackexchange and reddit threads, however, people say that it's yet unsolved. Is there an error in this paper?
2026-02-23 03:58:09.1771819089
Is this a proof for the rational distance problem of a unit square?
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