例句與造句

1. However, there exist linklessly embeddable graphs that are not apex graphs.
2. It follows from their proof that linklessly embeddable graphs, a three-dimensional analogue of planar graphs, have chromatic number at most five.
3. The set of forbidden minors for the linklessly embeddable graphs was identified by : the seven graphs of the Petersen family are all minor-minimal intrinsically linked graphs.
4. The graphs with Hadwiger number at most five include the apex graphs and the linklessly embeddable graphs, both of which have the complete graph " K " 6 among their forbidden minors.
5. Linklessly embeddable graphs form a minor-closed family with the seven graphs in the Petersen family as their minimal forbidden minors; therefore, these graphs are also forbidden as minors for the apex graphs.
6. It's difficult to find linklessly embeddable graph in a sentence. 用linklessly embeddable graph造句挺難的
7. In analogy to the characterizations of the outerplanar and planar graphs as being the graphs with Colin de Verdi鑢e graph invariant at most two or three, the linklessly embeddable graphs are the graphs that have Colin de Verdi鑢e invariant at most four.
8. In analogy to Kuratowski's and Wagner's characterizations of the planar graphs as being the graphs that do not contain " K " 5 or " K " 3, 3 as a minor, the linklessly embeddable graphs may be characterized as the graphs that do not contain as a minor any of the seven graphs in the Petersen family.