| 摘要: | 
	         
			 
		     | 本文研究了具有周期系数的一阶和二阶线性微分方程的Hyers-Ulam稳定性.利用常数变易法,获得了其Hyers-Ulam稳定性的充分必要条件,推广了具有周期系数的一阶齐次线性微分方程Hyers-Ulam稳定性的相关结果. | 
	         
			
	         
				| 关键词:  型稳定性  线性微分方程  周期系数  充要条件 | 
	         
			 
                | DOI: | 
           
            
                | 分类号:O175.13 | 
             
			 
             
                | 基金项目:上海市自然科学基金资助(21ZR1401000). | 
             
           | 
           
                | HYERS–ULAM STABILITY OF LINEAR DIFFERENTIAL EQUATIONS WITH PERIODIC COEFFICIENTS | 
           
           
			
                | 
				
				DONG Ju-yue, XIE Feng
						
				
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				College of Science, Donghua University, Shanghai 201620, China
				
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                | Abstract: | 
              
			
                | This paper deals with Hyers-Ulam stability (HUS) of first and second order linear differential equations with periodic coefficients. Necessary and sufficient conditions are established for Hyers-Ulam stability of the linear differential equations by means of the constant variation method. The related results of Hyers-Ulam stability for first order homogeneous linear differential equations with periodic coefficients are generalized. | 
            
	       
                | Key words:  Hyers-Ulam stability  linear differential equations  periodic coefficient  necessary and sufficient |