As for the numericial mthods we present a method using newton iteration and lp ( lift-projection ) iteration to slove inverse real symmetric eigenvalue problems . then wo can choose any starting points, then wo can get good starting value for the purpose of the preconditioning the numerical examples show the method is efficient and available 對于數(shù)值算法,將lp迭代和一般的newton迭代法結(jié)合起來求解含參變量的實對稱矩陣特征值反問題,lp迭代預(yù)處理了newton迭代法的初始值,拓寬了newton迭代法初始值的選取范圍,數(shù)值例子也說明lp?newton法具有較高的效率和實用性。