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Step * of Lemma bag_combine_empty_lemma

∀f:Top. (⋃x∈{}.f[x] ~ {})
BY
{ (UnivCD THENA Auto) }

1
1. f : Top@i
⊢ ⋃x∈{}.f[x] ~ {}

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Latex:

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Latex:
\mforall{}f:Top.  (\mcup{}x\mmember{}\{\}.f[x]  \msim{}  \{\})


By

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Latex:
(UnivCD  THENA  Auto)

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