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function v = domain(nod,x,dm,ngs) 
%DETERMINES NODES IN DOMAIN OF INFLUENCE OF POINT GPOS 
dif = nod*ones(1,ngs)-gs; 
a = dm-abs(dif); 
b = [a;zeros(1,nnodes)]; 
c = all(b>=-100*eps); 
v = find(c);