ke that library
      accessible for a run of the test program.
      <ul>
        <li>
          <a href = "vandermonde_interp_1d_test.m">vandermonde_interp_1d_test.m</a>, calls all the tests;
        </li>
        <li>
          <a href = "vandermonde_interp_1d_test_output.txt">vandermonde_interp_1d_test_output.txt</a>,
          the output file.
        </li>
        <li>
          <a href = "vandermonde_interp_1d_test01.m">vandermonde_interp_1d_test01.m</a>,
          computes the interpolant for a give