Step
*
1
2
of Lemma
lower-rc-face-dimension
.....subterm..... T:t
2:n
1. k : ℕ
2. c : ℚCube(k)
3. j : ℕk
4. ↑Inhabited(c)
5. ↑Inhabited(c j)
6. dim(c j) = 0 ∈ ℤ
7. ↑Inhabited(c)
8. ∀[n:ℕ]. ∀[f:ℕn ⟶ ℤ]. Σ(f[x] | x < n) = (f[j] + Σ(if (x =z j) then 0 else f[x] fi | x < n)) ∈ ℤ supposing j < n
⊢ Σ(if (i =z j) then 0 else dim(if (i =z j) then [fst((c i))] else c i fi ) fi | i < k)
= Σ(if (i =z j) then 0 else dim(c i) fi | i < k)
∈ ℤ
BY
{ (EqCDA THEN AutoSplit) }
Latex:
Latex:
.....subterm..... T:t
2:n
1. k : \mBbbN{}
2. c : \mBbbQ{}Cube(k)
3. j : \mBbbN{}k
4. \muparrow{}Inhabited(c)
5. \muparrow{}Inhabited(c j)
6. dim(c j) = 0
7. \muparrow{}Inhabited(c)
8. \mforall{}[n:\mBbbN{}]. \mforall{}[f:\mBbbN{}n {}\mrightarrow{} \mBbbZ{}].
\mSigma{}(f[x] | x < n) = (f[j] + \mSigma{}(if (x =\msubz{} j) then 0 else f[x] fi | x < n)) supposing j < n
\mvdash{} \mSigma{}(if (i =\msubz{} j) then 0 else dim(if (i =\msubz{} j) then [fst((c i))] else c i fi ) fi | i < k)
= \mSigma{}(if (i =\msubz{} j) then 0 else dim(c i) fi | i < k)
By
Latex:
(EqCDA THEN AutoSplit)
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