【摘要】 本文给出了高阶齐权方程的概念及按律降阶的方法，并推及准齐权方程 .齐权方程的引入大大拓宽了可降阶的高阶方程的范围．更多还原

【Abstract】 The concept of higher－ order homogeneous weight equations and methods of reducing orders according to certain laws are introduced and then,quasi－ homogeneous weight equations were reasoned.The introduction of homogeneous equation theory extends the scope of reducible order higher－ order equations greatly,and increases the feasibility of the operating method of reducing orders.更多还原