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Step * 1 of Lemma cu-cube-filler-fills

.....assertion..... 
1. [I] : Cname List
2. [alpha] : c𝕌(I)
3. [L] : Cname List
4. [f] : name-morph(I;L)
5. [J] : nameset(L) List
6. [x] : nameset(L)
7. [i] : ℕ2
8. [box] : A-open-box(unit-cube(I);Kan-type(alpha);L;f;J;x;i)
⊢ SqStable(Kan-A-filler(unit-cube(I);Kan-type(alpha);cu-cube-filler(alpha)))
BY
{ (BLemma `sq_stable_Kan-A-filler` THEN RWW "cu-cube-family-Kan-type-at<" 0 THEN Auto) }

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Latex:

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Latex:
.....assertion..... 
1.  [I]  :  Cname  List
2.  [alpha]  :  c\mBbbU{}(I)
3.  [L]  :  Cname  List
4.  [f]  :  name-morph(I;L)
5.  [J]  :  nameset(L)  List
6.  [x]  :  nameset(L)
7.  [i]  :  \mBbbN{}2
8.  [box]  :  A-open-box(unit-cube(I);Kan-type(alpha);L;f;J;x;i)
\mvdash{}  SqStable(Kan-A-filler(unit-cube(I);Kan-type(alpha);cu-cube-filler(alpha)))


By

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Latex:
(BLemma  `sq\_stable\_Kan-A-filler`  THEN  RWW  "cu-cube-family-Kan-type-at<"  0  THEN  Auto)

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