平面图的 meaning in Chinese

ichnographic

A note on hamiltonian 3 - regular 2 - connected planar graphs
连通平面图的一个注记
Circular chromatic number and criticality of planar graphs
平面图的循环色数与临界性
On the total coloring of a special double - outer planar graph
一个特殊的双外平面图的全染色
The cycle packing problem on some special classes of planar graphs
几类特殊平面图的圈包装问题
Cycle bases structure of outerplanar graphs
外可平面图的圈基结构

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