* Where they say `r[x/n]`, that's our `g{x:=n}`.
* Their function `g`, which assigns objects from the domain to pegs, corresponds to our store function, which assigns entities to indexes.
* Where they say `r[x/n]`, that's our `g{x:=n}`.
* Their function `g`, which assigns objects from the domain to pegs, corresponds to our store function, which assigns entities to indexes.