em" href="articles/a4-inv-ex2.html">4. Matrix inversion by elementary row operations</a></li>
    <li><a class="dropdown-item" href="articles/a5-ginv.html">5. Generalized inverse</a></li>
    <li><a class="dropdown-item" href="articles/a6-inv-3d.html">6. Linear transformations and matrix inverse in 3D</a></li>
    <li><a class="dropdown-item" href="articles/a7-eigen-ex1.html">7. Eigenvalues and Eigenvectors: Properties</a></li>
    <li><a class="dropdown-item" href="articles/a8-eigen-ex2.html">8. Eigenvalue