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来自「浙江大学计算机学院数据结构课程的教学课件」· HTM 代码 · 共 89 行
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<pre align="left">
<b><font face="Arial, Helvetica, sans-serif" size="4" color="#000000">definition: <font color="#FF0000"> low</font>
for each vertex of G such that low(u) is the lowest depth first
number that we can reach from u using a path of descendants
followed by at most one back edge:
<font color="#FF0000"> low(u) <font color="#000000">= </font> min { dfn(u), min { low(w) | <i><font color="#000000"> w is a child of u</font> </i>}
min { dfn(w) | <i><font color="#000000">(u,w) is a back edge</font></i>}}
</font><font color="#FF0000">
□</font><font color="#0033CC"><i>u is an articulation point</i></font>
iff u is either
the <font color="#FF0000">root</font> of the spanning tree and has two or more children,
or u is not the root and u has a child w
such that <i><font color="#FF0000">low(w) >= dfn(u). </font></i></font></b></pre>
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<td width="90" height="31"><font color="#FF0033"><b><font face="Arial, Helvetica, sans-serif" size="4"><i>vertex</i></font></b></font></td>
<td width="43" height="31"><font face="Arial" size="4"><i><b><font color="#333333">0</font></b></i></font></td>
<td width="44" height="31" bgcolor="#FF0033"><font face="Arial" size="4"><i><b><font color="#333333">1</font></b></i></font></td>
<td width="42" height="31"><font face="Arial" size="4"><i><b><font color="#333333">2</font></b></i></font></td>
<td width="43" height="31" bgcolor="#FF0033"><font face="Arial" size="4"><i><b><font color="#333333">3
</font></b></i></font></td>
<td width="43" height="31"><font face="Arial" size="4"><i><b><font color="#333333">4
</font></b></i></font></td>
<td width="44" height="31" bgcolor="#FF0033"><font face="Arial" size="4"><i><b><font color="#333333">5</font></b></i></font></td>
<td width="45" height="31"><font face="Arial" size="4"><i><b><font color="#333333">6
</font></b></i></font></td>
<td width="47" height="31" bgcolor="#FF0033"><font face="Arial" size="4"><i><b><font color="#333333">7</font></b></i></font></td>
<td width="47" height="31"><font face="Arial" size="4"><i><b><font color="#333333">8</font></b></i></font></td>
<td width="42" height="31"><font face="Arial" size="4"><i><b><font color="#333333">9</font></b></i></font></td>
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<td width="90"><font color="#FF0033"><b><font face="Arial, Helvetica, sans-serif" size="4"><i>dfn</i></font></b></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#333333">4</font></b></i></font></td>
<td width="44"><font face="Arial" size="4"><i><b><font color="#333333">3</font></b></i></font></td>
<td width="42"><font face="Arial" size="4"><i><b><font color="#333333">2
</font></b></i></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#333333">0</font></b></i></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#333333">1</font></b></i></font></td>
<td width="44"><font face="Arial" size="4"><i><b><font color="#333333">5</font></b></i></font></td>
<td width="45"><font face="Arial" size="4"><i><b><font color="#333333">6</font></b></i></font></td>
<td width="47"><font face="Arial" size="4"><i><b><font color="#333333">7</font></b></i></font></td>
<td width="47"><font face="Arial" size="4"><i><b><font color="#333333">9</font></b></i></font></td>
<td width="42"><font face="Arial" size="4"><i><b><font color="#333333">8</font></b></i></font></td>
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<td width="90"><font color="#FF0033"><b><font face="Arial, Helvetica, sans-serif" size="4"><i>low</i></font></b></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#333333">4</font></b></i></font></td>
<td width="44"><font face="Arial" size="4"><i><b><font color="#0000FF">3</font></b></i></font></td>
<td width="42"><font face="Arial" size="4"><i><b><font color="#333333">0</font></b></i></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#0000FF">0</font></b></i></font></td>
<td width="43"><font face="Arial" size="4"><i><b><font color="#333333">0</font></b></i></font></td>
<td width="44"><font face="Arial" size="4"><i><b><font color="#333333">5</font></b></i></font></td>
<td width="45"><font face="Arial" size="4"><i><b><font color="#333333">5</font></b></i></font></td>
<td width="47"><font face="Arial" size="4"><i><b><font color="#0033CC">5</font></b></i></font></td>
<td width="47"><font face="Arial" size="4"><i><b><font color="#333333">9</font></b></i></font></td>
<td width="42"><font face="Arial" size="4"><i><b>8</b></i></font></td>
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