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Step * 1 of Lemma lsum_nil_lemma


1. f : Top
⊢ Σ(f[x] | x ∈ []) ~ 0
BY
{ Try (RW (AddrC [1] (UnfoldC `lsum` ANDTHENC ReduceC)) 0)⋅ }

1
1. f : Top
⊢ 0 ~ 0

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Latex:

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Latex:

1.  f  :  Top
\mvdash{}  \mSigma{}(f[x]  |  x  \mmember{}  [])  \msim{}  0


By

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

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