Mathematicians make rare breakthrough on notoriously tricky 'Ramsey number' problem

[admin]

The bounds on Ramsey numbers, which describe relationships between nodes in a network, have been narrowed.

Mathematicians make rare breakthrough on notoriously tricky 'Ramsey number' problem : Read more

 

[Davidstuartall4u]

Maybe the 3 house and 3 utility puzzle and count the lines?