1、The minus involves the concept, the number axis, the absolute value, the rational number operation and so on.
2、The application of the theory of Yin and Yang in TCM can be explained with a number axis.
3、A geometrical expressive method of the machine-readable data concerning number axis is introduced, and with this method, the question of overflow related to complement arithmetic is analyzed.
4、This paper gives a method of judging the hybridization form of central atomic orbital by number axis, its applications and laws.
