Example Let A be the category (0 → 1) consisting of a single nontrivial map. Then an object of SetobA is a pair (P0, P1) of sets, and an object of SetA is a function X0 f → X1 between a pair of ...
I could launch a separate blog titled “Cartoon Maps,” given the number of cartoonists who have reimagined the Western Hemisphere according to Trump. Some were pretty good, some were not. But Bob ...