Step
*
2
1
of Lemma
eq-finite-seqs-implies-eq-upto
.....antecedent.....
1. a : ℕ ⟶ ℕ
2. b : ℕ ⟶ ℕ
3. x : ℤ
4. 0 < x
5. ↑eq-finite-seqs(a;b;x)
⊢ ↑eq-finite-seqs(a;b;x - 1)
BY
{ (Unfold `eq-finite-seqs` (-1) THEN (RWO "primrec-unroll" (-1) THENA Auto) THEN MoveToConcl (-1) THEN AutoSplit) }
Latex:
Latex:
.....antecedent.....
1. a : \mBbbN{} {}\mrightarrow{} \mBbbN{}
2. b : \mBbbN{} {}\mrightarrow{} \mBbbN{}
3. x : \mBbbZ{}
4. 0 < x
5. \muparrow{}eq-finite-seqs(a;b;x)
\mvdash{} \muparrow{}eq-finite-seqs(a;b;x - 1)
By
Latex:
(Unfold `eq-finite-seqs` (-1)
THEN (RWO "primrec-unroll" (-1) THENA Auto)
THEN MoveToConcl (-1)
THEN AutoSplit)
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