Nuprl Lemma : sq_stable_Kan-A-filler

[X:CubicalSet]. ∀[A:{X ⊢ _}]. ∀[filler:I:(Cname List)
                                        ⟶ alpha:X(I)
                                        ⟶ J:(nameset(I) List)
                                        ⟶ x:nameset(I)
                                        ⟶ i:ℕ2
                                        ⟶ A-open-box(X;A;I;alpha;J;x;i)
                                        ⟶ A(alpha)].
  SqStable(Kan-A-filler(X;A;filler))


Proof




Definitions occuring in Statement :  Kan-A-filler: Kan-A-filler(X;A;filler) A-open-box: A-open-box(X;A;I;alpha;J;x;i) cubical-type-at: A(a) cubical-type: {X ⊢ _} I-cube: X(I) cubical-set: CubicalSet nameset: nameset(L) coordinate_name: Cname list: List int_seg: {i..j-} sq_stable: SqStable(P) uall: [x:A]. B[x] function: x:A ⟶ B[x] natural_number: $n
Definitions unfolded in proof :  uall: [x:A]. B[x] Kan-A-filler: Kan-A-filler(X;A;filler) member: t ∈ T all: x:A. B[x] subtype_rel: A ⊆B uimplies: supposing a nameset: nameset(L) A-open-box: A-open-box(X;A;I;alpha;J;x;i) and: P ∧ Q implies:  Q sq_stable: SqStable(P) squash: T fills-A-open-box: fills-A-open-box(X;A;I;alpha;bx;cube) fills-A-faces: fills-A-faces(X;A;I;alpha;bx;L) so_lambda: λ2x.t[x] prop: so_apply: x[s] is-A-face: is-A-face(X;A;I;alpha;bx;f) spreadn: spread3 A-face: A-face(X;A;I;alpha)
Lemmas referenced :  list_wf coordinate_name_wf I-cube_wf nameset_wf int_seg_wf A-open-box_wf subtype_rel_list cubical-type-at_wf cubical-type_wf cubical-set_wf sq_stable__l_subset decidable__equal-coordinate_name sq_stable__l_all A-face_wf l_member_wf is-A-face_wf sq_stable__all all_wf fills-A-open-box_wf squash_wf equal_wf list-diff_wf cname_deq_wf cons_wf nil_wf cube-set-restriction_wf face-map_wf2 cubical-type-ap-morph_wf
Rules used in proof :  sqequalSubstitution sqequalTransitivity computationStep sqequalReflexivity isect_memberFormation_alt functionIsType universeIsType cut introduction extract_by_obid sqequalHypSubstitution isectElimination thin hypothesis hypothesisEquality natural_numberEquality dependent_functionElimination applyEquality independent_isectElimination lambdaEquality_alt setElimination rename inhabitedIsType sqequalRule productElimination because_Cache independent_functionElimination lambdaFormation_alt imageMemberEquality baseClosed imageElimination setIsType closedConclusion axiomEquality

Latex:
\mforall{}[X:CubicalSet].  \mforall{}[A:\{X  \mvdash{}  \_\}].  \mforall{}[filler:I:(Cname  List)
                                                                                {}\mrightarrow{}  alpha:X(I)
                                                                                {}\mrightarrow{}  J:(nameset(I)  List)
                                                                                {}\mrightarrow{}  x:nameset(I)
                                                                                {}\mrightarrow{}  i:\mBbbN{}2
                                                                                {}\mrightarrow{}  A-open-box(X;A;I;alpha;J;x;i)
                                                                                {}\mrightarrow{}  A(alpha)].
    SqStable(Kan-A-filler(X;A;filler))



Date html generated: 2019_11_05-PM-00_29_26
Last ObjectModification: 2018_11_14-AM-10_17_25

Theory : cubical!sets


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