<map id="YSLib::FetchSignFromInterval" name="YSLib::FetchSignFromInterval">
<area shape="rect" id="node1" title="判断 d 和以 [a, b](a ≤ b) 或 [b, a](a &gt; b) 区间的关系。" alt="" coords="5,5,200,32"/>
<area shape="rect" id="node2" href="$d4/d10/a01278.xhtml#a27e78aac4fd551c6f4d122183e99f18c" title="符号函数。" alt="" coords="248,5,367,32"/>
</map>
