... A crash course in topos theory: the big picture" (I & II) by André Joyal 14h-17h : “Introduction to categorical logic, classifying toposes and the 'bridge ...
... (II) Presentable categories, "free toposes" and the Giraud's definition of toposes A useful principle is that a topos is a commutative ring-like object ...
... 1984] shows that the jump in generality from locales to toposes is not so very great and can be summed up in the slogan : "topos = locale + groupoid ...
... le cours d' O. Caramello du 15 janvier 2013 : "topos classifiant d ...
Johnstone & Butz Carsten Butz and Peter Johnstone, Classifying toposes for first ...