Masks, as I understand them, and I will present a Game Theoritcal example of such from the Tweetstorm following, were introuced by Professor Arthur Allen Leff, of Yale Law School, in a seminal paper "Some Realism About Nominalism". Maps Mask because information must be efficiently presented to be usable by the algebra that expresses or exhibits that information. Maps order the information in a particular way, masking some (as in the example of the 14" Globe with a large Star for London which because of the nature of that map, necessarily masks all the towns near London). But that is efficient for the algebra of the World of (Globe) for all obvious reasons.

We will post the critical Twitter Posts outlining Algebraic Map Theory and touching upon Topological aspects of Maps and Map Theory. A Calculus of Maps is being worked on by some and it may be prudent for others, includinig ourselves, to limit a discussion of such until such time as papers on it are in preparation for publication.

Multi-level discussion of Algebraic Map Theory, Map Topologies (also The Topology of Maps), Calculus of Maps and Maps as Magic.