The City of the Infinite Neighborhood

To enter this city, you must first understand that space is bent. It is a neighborhood of infinity, where streets are defined by monads and Clifford algebras. The buildings are theoretical constructs, existing only as long as the mathematics holds.

The inhabitants are physicists of the abstract. They simulate universes in solo RPGs and hide information from themselves to make the game real.

"Walk carefully," the warning reads. "You may step into a super tensor product."