| sk = fs ', is_fskey(sk), ∀ class1, class2, ty, fieldvar, val, st. class1 = class2 ∨ addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st) ⊦ class1 = class2, addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st), fs .class = class1 |
∀ class1, class2, ty, fieldvar, val, st. class1 = class2 ∨ addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st) ⊦ class1 = class2, addclass(class1, fis0 + (mkfs(class2, ty, fieldvar) ' × val) ', st) = addclass(class1, fis0, st), fs .class = class1
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_fskey(fs ')])]]