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Proof step 61 from proof validref-subspec-samesubclasses (previous step)

st[r -- _type] = typeval(ty), tdname+∃(str0, class), same-subclasses-contains(class, str, str0), junkref(str, r, st), r -- _type ∈ st, is_typevalue(st[r -- _type]), ty ≤ mkclasstype(class), r ∈ st ⊦ r = jvmref, junkref(str0, r, st), same-subclasses-contains(ty .jtelemtype .class, str, str0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 60:
st[r -- _type] = typeval(ty), r ∈ st, ty ≤ mkclasstype(class), r -- _type ∈ st, junkref(str, r, st), same-subclasses-contains(class, str, str0), tdname+∃(str0, class) ⊦ r = jvmref, same-subclasses-contains(ty .jtelemtype .class, str, str0), junkref(str0, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_typevalue(typeval(ty))])]]