Putnam 1988 A4
- Session A
(a) If every point of the plane is painted one of three colors, do there necessarily exist two points of the same color exactly one inch apart?
(b) What if "three" is replaced by "nine"?
Curated text Kedlaya Putnam archive. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.