class="n">l</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">l</span><span class="o">+</span><span class="mi">1</span>
<span class="w">   </span><span class="k">enddo </span><span class="n">infinite</span>
<span class="k">end subroutine </span><span class="n">mat_rref</span>
</pre></div>

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