I am looking for a conjecture in plane geometry?

Question

No one had an answer, the last time I asked this....

I am looking for an unproven conjecture, that has a name (like "Fermat's Last Theorem"), as well as the name of the mathematician that first posed it.

Answer 1

Unproven conjectures in classical geometry are rare these days, especially those that don't ulimately involve number theory as well. But the links below give a list of interesting examples of maybe of what you're looking for. The last link, a PDF file, lists a number of unsolved problems in plane geometry.

However, I can't think of any "Fermat's Last Theorem" conjecture in plane geometry that is so famous that it has the name of the mathematician that first suggested it, and is still unsolved.

Answer 2

Problem 5 in the last link above is commonly called the Erdős-Szekeres conjecture.

Steve