mo>+</mo><mn>7.63</mn><mi>i</mi></mtd>
   <mtd><mrow><mo>-</mo><mn>2.84</mn></mrow><mo>+</mo><mn>2.78</mn><mi>i</mi></mtd>
</mtr>
</mtable></mfenced>
 <mtext>.</mtext>
</math></td><td class="formula2">&#xa0;</td></tr></table></div>

</div><div class="paramtext">The solution is obtained by first obtaining a <math><mi>Q</mi><mi>R</mi></math>&#xa0;factorization with column pivoting of the matrix <math><mi>A</mi></math>, and then the <math><mi>R</mi><mi>Z</mi></math>&#xa0;factorization of the leading <math><mi>