“planar graph”造句，怎麼用planar graph造句

In this paper, we give some group chromatic of simple planar graphs.

In this paper, Euler's formula and Handshaking lemma is used to obtain the face chromatic number of a planar graph by solving equations.

List edge and list total colorings of planar graphs with adjacent triangles

A note on 3-list-coloring of planar graphs

Research of shape similarity for planar graph in multi-scale geographical space