Three clouds may cover the plane
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Péter Komjáth
📂
Article
📅
2001
🏛
Elsevier Science
🌐
English
⚖ 69 KB
In an interesting paper [2] Ginsburg and Linek considered the question whether the plane can be covered with 3 stars where a star consists of a point and a segment of ÿnite length on every half-line from that point. We have not been able to prove this conjecture, but under the continuum hypothesis w