Další seminář z algebry se koná 24.1.2019 od 13.00 v posluchárně M5. Giulio Lo MonacoOn two extensions of the notion of ootopos Abstrakt: The two notions of elementary ootopos and oopretopos as in the title should hopefully be the correct analog of their counterparts in ordinary topos theory. The focus here will be put on their precise relationship with the much better known ootoposes. In particular, under suitable settheoretical assumptions, both of these classes of objects contain the class of geometric ootoposes, and they do so strictly, for which explicit counterexamples can be provided.
