- Home »
- Causal Sets and Frame-Valued Set Theory

Playing this video requires the latest flash player from Adobe.

Download link (right click and 'save-as') for playing in VLC or other compatible player.

Speaker(s):

Scientific Areas:

Collection/Series:

Subjects:

PIRSA Number:

12050049

In spacetime physics any set *C* of events—a *causal set—*is taken to be partially ordered by the relation £ of *possible causation*: for *p, q *Î C, *p *£ *q *means that *q *is in *p’s *future light cone. Fotini Markopoulou has proposed that the causal structure of spacetime itself be represented by “sets evolving over C” —that is, in essence, by the topos Set ^{C} of presheaves on C^{op. } In this talk I am going to show how Set ^{C} may be effectively replaced by a certain model *V ^{(H)}*of intuitionistic set theory—

©2012 Perimeter Institute for Theoretical Physics