function y = dsum(v,w)
% DSUM y = dsum(v,w)  Distinct pair sums of elements
% Version of 5/15/97
% v,w row vectors
% Distinct elements among pair sums
% of elements of v, w.
% Uses m-function distinct
[a,b] = meshgrid(v,w);
t = a+b;
y = distinct(t(:)');