Step
*
of Lemma
no_repeats_l_index
∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[L:T List]. ∀[i:ℕ||L||]. index(L;L[i]) ~ i supposing no_repeats(T;L)
BY
{ ((UnivCD THENA Auto)
THEN (Assert index(L;L[i]) = i ∈ ℤ BY
(Unfold `l_index` 0 THEN BLemma `no_repeats_mu_index` THEN Auto))
THEN (HypSubst' (-1) 0)
THEN Auto) }
Latex:
Latex:
\mforall{}[T:Type]. \mforall{}[eq:EqDecider(T)]. \mforall{}[L:T List]. \mforall{}[i:\mBbbN{}||L||].
index(L;L[i]) \msim{} i supposing no\_repeats(T;L)
By
Latex:
((UnivCD THENA Auto)
THEN (Assert index(L;L[i]) = i BY
(Unfold `l\_index` 0 THEN BLemma `no\_repeats\_mu\_index` THEN Auto))
THEN (HypSubst' (-1) 0)
THEN Auto)
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