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Step * 1 of Lemma len_nil_lemma

len([]) ~ 0
BY
{ Try (RW (AddrC [1] (UnfoldC `len` ANDTHENC ReduceC)) 0)⋅ }

1
0 ~ 0

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Latex:

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Latex:
len([])  \msim{}  0


By

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Latex:
Try  (RW  (AddrC  [1]  (UnfoldC  `len`  ANDTHENC  ReduceC))  0)\mcdot{}

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