constant.elf il.elf nat.elf ile.elf il-simp.elf expand.elf subtype.elf el.elf algorithm.elf translate.elf convert.elf nat.thm equality.thm subst-fun.thm strengthen.thm explicit-lemmas.thm regularity.thm subst-effect.thm inversion.thm substitution.thm expand.thm subtype-lemmas.thm trans-fun.thm trans-reg.thm trans-sub.thm esubstitution.thm functionality.thm eregularity.thm convert-effect.thm convert-explicit.thm convert-reg-il.thm convert-fun.thm convert-normal.thm convert-sub.thm convert-reg.thm sound.thm complete.thm correct.thm el-inversion.thm