olymmath

Putnam 2008 B1

  • Session B

What is the maximum number of rational points that can lie on a circle in R2\mathbb{R}^2 whose center is not a rational point? (A rational point is a point both of whose coordinates are rational numbers.)

Curated text Kedlaya Putnam archive. Quoted with source.

Solutions

Human solution Solution 1 by Kiran Kedlaya and Lenny Ng

The terms of the source let olymmath link to this solution but not copy it. Read the solution (Kedlaya Putnam archive).

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