摘要: 本文给出了矩阵方程 (Ⅰ )AXAT+BYBT =C ,(Ⅱ ) (ATXA ,BTZB) =(C ,D)有亚半正定解的充要条件. 
                                                        
                              
                             
                            
                            																								
								
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                                        															何楚宁 . 两类矩阵方程有亚半正定解的充要条件[J]. 数学季刊, 2002, 16(4): 62-68.	
																																									     												                                                                                                        	                                                                                                                      HE Chu-ning. The Necessary and Sufficient Conditions for Two Kinds of Matrix Equtions Having Semipositive Subdefinite Solutions [J]. Chinese Quarterly Journal of Mathematics, 2002, 16(4): 62-68.