Some problems concerning groups are best attacked by using graphs.有关群的一些问题可以使用图来很好地解答.Diagrams and graphs are indispensable visual aids in many aspects of economics.图形和图解在经济学的许多方面是重要的形象工具.We shall consider partitions of ...
Subjective judgments based on frequency graphs vary greatly from cartographer to cartographer.根据频率图所作的主观判断,因编图人员不同而变化甚大.In this paper, split graphs with complete endomorphism - regularity are characterized explicitly.本文给...