Step
*
of Lemma
apply_alist_cons_lemma
∀x,v,u,eq:Top. (apply-alist(eq;[u / v];x) ~ if eqof(eq) (fst(u)) x then inl (snd(u)) else apply-alist(eq;v;x) fi )
BY
{ (UnivCD THENA Auto) }
1
1. x : Top@i
2. v : Top@i
3. u : Top@i
4. eq : Top@i
⊢ apply-alist(eq;[u / v];x) ~ if eqof(eq) (fst(u)) x then inl (snd(u)) else apply-alist(eq;v;x) fi
Latex:
Latex:
\mforall{}x,v,u,eq:Top.
(apply-alist(eq;[u / v];x) \msim{} if eqof(eq) (fst(u)) x
then inl (snd(u))
else apply-alist(eq;v;x)
fi )
By
Latex:
(UnivCD THENA Auto)
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