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Proof step 1 from proof le-mapped (conclusion)
n < # avol0 ⊦ avol0 ⊆ avol1 ∧ avol0[n].mapped? → avol1[n].mapped?
System applied rule normalize
And obtained the following new goals
Proof step 2
:
avol0[n].mapped?, n < # avol0, avol0 ⊆ avol1 ⊦ avol1[n].mapped?
Rule argument
Additional information