function afine = SAIDyadDown(beta,alfa,D,F,EF,t,j)
% SAIDyadDown -- SAI Dyad Down
%  Usage
%    afine = SAIDyadDown(beta,alfa,D,F,EF,t,j)
%

n = length(beta);
ahat = SegRefine(beta,D,F,EF,t,j);
adif =  [(-alfa) ; alfa ];
adif = adif(:)';
afine = ahat + adif;
afine = afine ./sqrt(2);
    
    
    
 
 
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