letteral for z.
- fi'ai (exp!)
- marks end of prenex in stack-based dialect
- mekso operator: finite result set derived from/on set A with/due to operator/function B under ordering of application C
- x1 (plural of ordered pairs) is an exhaustive set (possibly infinite) of inputs/outputs defining a unary function which yields result x3 when given input x2; x1(x2) = x3
- x1 is a voiced alveolar sibilant fricative sound produced by x2.