Cameron explains his interests in boundaries as: "The convention of the boundary is deeply contradictory.  Boundary lines are integral to the social world and yet, by definition, they have no magnitude: they do not exist.  In this presentation Cameron argues that boundary lines serve as a foundational fiction for the modern globalised world, not only punctuating 'real' space, but also opening up an array of fictional spaces called xenospaces.  These are functional exteriors that have no physical existence but which shape and pervade everyday life.  By examining the boundary line as the spatial equivalent of a mathematical 'zero', this presentation questions the very basis of spatial practice and representation."  Following Cameron’s presentation he will be answering questions from the audience led by respondent Dr. Nicky Marsh of the University of Southampton.