| is_indexkey(fv .1), ∀ class1, i, val, st. addclass(class1, fis0 + (i ' × val) ', st) = addclass(class1, fis0, st) ⊦ addclass(class1, fis0 + (i ' × val) ', st) = addclass(class1, fis0, st) |
fv = sk × val0, is_indexkey(sk), ∀ class1, i, val, st. addclass(class1, fis0 + (i ' × val) ', st) = addclass(class1, fis0, st) ⊦ addclass(class1, fis0 + (i ' × val) ', st) = addclass(class1, fis0, st)
[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ sk = fv .1 ∧ val = fv .2 ↔ fv = sk × val])], [EXTRATERMS : (fv, sk, val0)]]