摘要: 
By using cone-directed contingent derivatives, the unified necessary and sufficient optimality conditions are given for weakly and strongly minimal elements respectively in generalized preinvex set-valued optimization.
                                                        
                            
                            																											
											
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                                        															丘京辉;. CONE--DIRECTED CONTINGENT DERIVATIVES AND GENERALIZED PREINVEX SET-VALUED OPTIMIZATION[J]. 数学物理学报(英文版), 2007, 27(1): 211-218.
																																									     												                                                                                                        	                                                           Qiu Jinghui. CONE--DIRECTED CONTINGENT DERIVATIVES AND GENERALIZED PREINVEX SET-VALUED OPTIMIZATION[J]. Acta mathematica scientia,Series B, 2007, 27(1): 211-218.