= Q_1 + x_1*x_3*Q_2 + x_2*x_3*x_4*Q_3
%
% where multi-indices are  
%
%             midx_1 = 0       (absolute term, Q_1)
%             midx_2 = [1,3]   (bilinear term, Q_2)
%             midx_3 = [2,3,4] (term for Q_3)
%
% List of elements of the user structure |pmidata|
%
%   name ... [optional] name of the problem
%   Nx ..... number of primal variables
%   Na ..... [optional] number of matrix inequalities (or diagonal blocks
%            of the matrix constraint)
%   xinit .. [optional] di