| ⊦ (addclass(class1, (sk × val0) ' + fis0, st)[jvmref -- sk, val]) = (addclass(class1, fis0, st)[jvmref -- sk, val]) |
⊦ is_indexkey(fv .1) → addclass(class, fv ' + fis, st) = addclass(class, fis, st)
¬ is_indexkey((sk × val0) .1) ⊦ (addclass(class1, (sk × val0) ' + fis0, st)[jvmref -- sk, val]) = (addclass(class1, fis0, st)[jvmref -- sk, val])
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, fis0, sk × val0, class1)]]