摘要
Given a system of polynomials PS: h<sub>1</sub>(y<sub>1</sub>,…, y<sub>n</sub>),…,h<sub>s</sub>(y<sub>1</sub>,…y<sub>n</sub>), by Ritt-Wu wellordering principle and changing notations for the variables appropriately, we can obtain an ascending chain AS:
基金
Project supported by the National Natural Science Foundation of China.