ikhonov Regularized Solution</span>
delta = .1;
xtych =  [A0; sqrt(delta)*eye(n)] \ [b; zeros(n,1)];

<span class="comment">% Robust Least Squares solution</span>
cvx_begin <span class="string">sdp</span> <span class="string">quiet</span>
    variables <span class="string">t</span> <span class="string">lambda</span> <span class="string">xrob(n)</span>
    minimize(t+lambda)
    subject <span class="string">to</span>
        [eye(m) A1*xrob A2*xrob A0*xrob-b; <span class="keyword">...</span>
         [A1*xro