NAMING CONVENTIONS FOR METAVARIABLES
A,B : arity
-C,D : candidate of reducibility
-E,F : RTM environment
-G : global environment
+C : candidate of reducibility
+D,E : RTM environment
+F,G : global environment
H : reserved: transient premise
IH : reserved: inductive premise
I,J : item
c: conversion
d: decomposed extended reduction
e: decomposed extended conversion
+n: reduction for "big tree" normal forms
q: restricted reduction
r: reduction
s: substitution
u: supclosure
x: extended reduction
+y: extended substitution
- forth letter (if present)
-c: proper single step (successor)
+c: proper single step (general) (successor)
e: reflexive transitive closure to normal form (evaluation)
g: proper multiple step (general) (greater)
p: non-reflexive transitive closure (plus)
q: reflexive closure (question)
r: proper multiple step (restricted) (restricted)
s: reflexive transitive closure (star)
+u: proper single step (restricted) (unit)