The Deranged Mathematician: Chrono Trigger and the Hairy Ball Theorem
It is an open secret that many JPRG worlds (such as *Chrono Trigger*'s) are not spheres, as you would expect; they are >!tori!<! In fact, games that properly take place on a sphere aren't entirely common, even in the present day.
Why? We explore two major mathematical obstructions: the Gauss-Bonnet theorem and the hairy ball theorem.