Блестящее описание теории категорий:
Paolo Aluffi писал(а):
The language of categories is affectionally known as abstract nonsense, so named by Norman Steenrod. This term is essentially accurate and not necessarily derogatory: categories refer to nonsense in the sense that they are all about the 'structure' and not about the 'meaning', of what they represent. The emphasis is less on how you run into a specific set you are looking at and more on how that sey may sit in relationship with all other sets. Worse (or better) still, the emphasis is less on studying sets, and functions between sets, than on studying 'things, and things that go from things to things' without necessarily being explicit about what these things are: they may be sets, or groups, or rings, or vector spaces, or modules, or other objects that are so exotic that the reader has no right whatsoever to know about them (yet).
28.04.2017, 04:21 
.
.
