{{menu|events|The iterative conception of properties and comprehension}}

Talk held by Sam Roberts (University of Oslo, Norway) at the KGRC [[Friday seminar]] on 2017‑05‑05.

===Abstract===
Mathematicians appeal to <i>proper classes</i>: that is, collections too large to form sets. But what are classes if
not sets? One response is that classes are <i>properties</i>. Properties are sharply distinguished from sets: they are
intensional whereas sets are extensional. Fine and Linnebo have proposed theories on which properties are “built up” in a
series of stages. Unfortunately, neither of these theories imply that there are very many properties. In this talk, I will
propose an improvement of these theories. More precisely, by ensuring that the stages extend far enough, I will show that
the they can be modified to interpret Morse-Kelly class theory, which implies the existence of a plethora of classes.
{{comment|=== Time and Place ===

Sandwiches at 12:00pm in the KGRC [[floor plan|meeting room]]

Talk at a convenient time afterward in the KGRC [[floor plan|lecture room]]}}