短语词组短語chordal bipartite graph 弦二部圖strongly chordal graph 強弦圖1 -chordal graph 弦圖-chordal graph 弦圖3 -chordal graph 弦圖non -chordal graph 非弦圖2 -chordal graph 弦圖complement of chordal graph 弦圖的補圖 返回 chordal graph