【摘要】 伴随是范畴论中最重要的概念之一,其定义涉及多个量且难以理解。介绍了伴随函子的几个等价定义,证明了各个定义的相互等价性,从而可以更加直观地理解伴随函子的定义,并给出了伴随函子的应用例子。更多还原

【Abstract】 The notion of adjunction is one of the most important concept in category,it is one of the hardest to understand due to the large numbers of entities involved.In this paper,different definitions of adjoint functors and their equivalences are proved.We attempt to provide some intuitive understanding of adjunvtion with examples of adjoint functor as given.更多还原