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Step * of Lemma grp_op_wf2

∀[g:OGrp]. (* ∈ |g|+ ⟶ |g|+ ⟶ |g|+)
BY
{ ((D 0  
THENM ExtWith [`a'] [|g| ⟶ |g| ⟶ |g|] 
THENM ExtWith [`b']  [|g| ⟶ |g|]) THENA Auto) }

1
1. g : OGrp
2. a : |g|+
3. b : |g|+
⊢ * a b ∈ |g|+

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Latex:

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Latex:
\mforall{}[g:OGrp].  (*  \mmember{}  |g|\msupplus{}  {}\mrightarrow{}  |g|\msupplus{}  {}\mrightarrow{}  |g|\msupplus{})


By

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Latex:
((D  0   
THENM  ExtWith  [`a']  [|g|  {}\mrightarrow{}  |g|  {}\mrightarrow{}  |g|] 
THENM  ExtWith  [`b']    [|g|  {}\mrightarrow{}  |g|])  THENA  Auto)

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