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Erdős problem 1071

Is there a region RR with a maximal set of disjoint unit line segments that is countably infinite? Solved affirmatively by [Fo99], who gave an explicit construction.

Erdős Problems records this as proved (Lean).

No Repository has ruled on it here.

How far the record reaches4 of 6 stages
  1. Sourceerdos-problems
  2. StatementRetained
  3. Formal2 retained
  4. Resolutionproved (Lean)
  5. WorkNone recorded
  6. DecisionNone here
  7. The questionNot reached
What this record is missingWork

Nothing here has checked that finding.

Reproducing it here turns a report into evidence.

Where the source files it109 share a topic
Erdős problem 94accepted
Carrying a Standing. Browse the topic.