feat: Add lemma SN.to_WN: SN implies Normalizable#736
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`SN.to_WN (hx : SN r x) : Normalizable r x` Proves that strong normalization implies weak normalization by induction on the SN structure, constructing the normal form via the single reduction step when a successor exists.
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Hi @chenson2018 Our main goal is to verify the smallest basis of untyped lambda calculus. |
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SN.to_WN (hx : SN r x) : Normalizable r xProves that strong normalization implies weak normalization by induction on the SN structure, constructing the normal form via the single reduction step when a successor exists.