We search for three distinct polynomials with integer coefficient such that the product of anytwo members of the set minus their sum and increased by a non-zero integer (or polynomial withinteger coefficient) is a perfect square.
The Bulletin of Society for Mathematical Services and Standards (Volume 10)
M.A. Gopalan et al., "Special Dio 3 - Tuples", The Bulletin of Society for Mathematical Services and Standards, Vol. 10, pp. 22-25, 2014