An Integer-Relation algorithm which is based on a partial sum of squares approach, from which the algorithm takes its name.
See also Ferguson-Forcade Algorithm, HJLS Algorithm, Integer Relation, LLL Algorithm, PSLQ Algorithm
Bailey, D. H. and Ferguson, H. R. P. ``Numerical Results on Relations Between Numerical Constants Using a New
Algorithm.'' Math. Comput. 53, 649-656, 1989.