2010/10/16 by Banks, William D., Covert, David
#Combinatorics (math.CO) #FOS: Mathematics #Number Theory (math.NT)
paper · doi:10.48550/arxiv.1010.3322
We estimate the sizes of the sumset A + A and the productset A ⋅ A in the special case that A = S (x, y), the set of positive integers n less than or equal to x, free of prime factors exceeding y.