Step
*
of Lemma
gamma-neighbourhood_wf
∀[beta:ℕ ⟶ ℕ]. ∀[n0:finite-nat-seq()]. (gamma-neighbourhood(beta;n0) ∈ finite-nat-seq() ⟶ (ℕ?))
BY
{ ((UnivCD THENA Auto)
THEN RepUR ``gamma-neighbourhood`` 0
THEN (MemCD THENA Auto)
THEN ((BoolCase ⌜init-seg-nat-seq(n;n0)⌝⋅ THENA Auto) THENL [Auto; Id])) }
1
1. beta : ℕ ⟶ ℕ
2. n0 : finite-nat-seq()
3. n : finite-nat-seq()
4. ¬↑init-seg-nat-seq(n;n0)
⊢ if TERMOF{extend-seq1-all-dec:o, 1:l} n n0 beta then inl 1 else inl 0 fi ∈ ℕ?
Latex:
Latex:
\mforall{}[beta:\mBbbN{} {}\mrightarrow{} \mBbbN{}]. \mforall{}[n0:finite-nat-seq()]. (gamma-neighbourhood(beta;n0) \mmember{} finite-nat-seq() {}\mrightarrow{} (\mBbbN{}?))
By
Latex:
((UnivCD THENA Auto)
THEN RepUR ``gamma-neighbourhood`` 0
THEN (MemCD THENA Auto)
THEN ((BoolCase \mkleeneopen{}init-seg-nat-seq(n;n0)\mkleeneclose{}\mcdot{} THENA Auto) THENL [Auto; Id]))
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