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Step * 1 of Lemma union_empty_lemma


1. b : Top@i
2. eq : Top@i
⊢ b ⋃ {} ~ b
BY
{ Try (RW (AddrC [1] (RepeatC (UnfoldsC ``fset-union empty-fset l-union`` ) ANDTHENC ReduceC)) 0)⋅ }

1
1. b : Top@i
2. eq : Top@i
⊢ b ~ b

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Latex:

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Latex:

1.  b  :  Top@i
2.  eq  :  Top@i
\mvdash{}  b  \mcup{}  \{\}  \msim{}  b


By

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Latex:
Try  (RW  (AddrC  [1]  (RepeatC  (UnfoldsC  ``fset-union  empty-fset  l-union``  )  ANDTHENC  ReduceC))  0)\mcdot{}

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