Erdős–Ulam problem

In mathematics, the Erdős–Ulam problem asks whether the plane contains a dense set of points whose Euclidean distances are all rational numbers. It is named after Paul Erdős and Stanislaw Ulam.

Unsolved problem in mathematics:

Is there a dense set of points in the plane at rational distances from each other?

(more unsolved problems in mathematics)

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.