 "(2/3)a" "(1/6)a+(1/2)b"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 3 "(1/4)b"        "(1/2)a" "(1/2)a+(3/4)b"</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 4 "0"             "0"      "a+b"          </span>
<span class="r-in"><span><span class="fu">gsegmat_symb</span><span class="op">(</span><span class="fl">6</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   0                1                 2                 3       