Some Equivalents of the Erdös Sum of Reciprocals Conjecture

The Erdos sum of reciprocals conjecture is the statement that whenever A is a set of positive integers and ∑∈ A 1/ x = ∞, A contains arbitrarily long arithmetic progressions. It is shown here that this conjecture is equivalent to each of several other statements. Some of these other statements are combinatorial in nature while others are topological-algebraic statements.