Step
*
of Lemma
ifthenelse-simplify2
∀[b,c:𝔹]. ∀[x,y:Top]. (if b then x if c then x else y fi ~ if b ∨bc then x else y fi )
BY
{ ((D 0 THENA Auto) THEN AutoBoolCase ⌜b⌝⋅) }
Latex:
Latex:
\mforall{}[b,c:\mBbbB{}]. \mforall{}[x,y:Top]. (if b then x if c then x else y fi \msim{} if b \mvee{}\msubb{}c then x else y fi )
By
Latex:
((D 0 THENA Auto) THEN AutoBoolCase \mkleeneopen{}b\mkleeneclose{}\mcdot{})
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