André JOYAL - 1/4 A crash course in topos theory : the big picture

About half of the topos theory of SGA4 is devoted to categorical generalities. They are now subsumed by the modern theory of (locally) presentable categories. I will sketch this theory, stressing the results that are important for topos theory. The category of
complete lattices and sup-preserving maps is a toy example of this theory.

Видео André JOYAL - 1/4 A crash course in topos theory : the big picture канала Institut des Hautes Études Scientifiques (IHÉS)