The symbol of the Empty Set, the set corresponding to the null polytope. A null polytope is the abstract polytope that corresponds to the empty set. It is -1 dimensional, since it is a subcomponent of a 0-dimensional point. They only exist in Cinioveres. Retrieved from "https://alldimensions.fandom.com/wiki/Null_polytope?oldid=23070" Categories: List of -1st dimension Community content is available under CC-BY-SA unless otherwise noted.