Nuprl Lemma : poset_functor_extend_same

C:SmallCategory. ∀I:Cname List. ∀L:name-morph(I;[]) ⟶ cat-ob(C). ∀E:i:nameset(I)
                                                                      ⟶ c:{c:name-morph(I;[])| (c i) 0 ∈ ℕ2} 
                                                                      ⟶ (cat-arrow(C) (L c) (L flip(c;i))).
x:cat-ob(poset-cat(I)).
  ∀[y:cat-ob(poset-cat(I))]
    poset_functor_extend(C;I;L;E;x;y) (cat-id(C) (L x)) ∈ (cat-arrow(C) (L x) (L x)) 
    supposing y ∈ cat-ob(poset-cat(I))


Proof




Definitions occuring in Statement :  poset_functor_extend: poset_functor_extend(C;I;L;E;c1;c2) poset-cat: poset-cat(J) name-morph-flip: flip(f;y) name-morph: name-morph(I;J) nameset: nameset(L) coordinate_name: Cname cat-id: cat-id(C) cat-arrow: cat-arrow(C) cat-ob: cat-ob(C) small-category: SmallCategory nil: [] list: List int_seg: {i..j-} uimplies: supposing a uall: [x:A]. B[x] all: x:A. B[x] set: {x:A| B[x]}  apply: a function: x:A ⟶ B[x] natural_number: $n equal: t ∈ T
Definitions unfolded in proof :  all: x:A. B[x] uall: [x:A]. B[x] member: t ∈ T uimplies: supposing a squash: T prop: subtype_rel: A ⊆B cat-ob: cat-ob(C) pi1: fst(t) poset-cat: poset-cat(J) name-morph: name-morph(I;J) so_lambda: λ2x.t[x] so_apply: x[s] and: P ∧ Q implies:  Q true: True guard: {T} iff: ⇐⇒ Q rev_implies:  Q
Lemmas referenced :  equal_wf squash_wf true_wf cat-arrow_wf subtype_rel_self name-morph_wf nil_wf coordinate_name_wf poset_functor_extend_wf all_wf nameset_wf le_wf extd-nameset_subtype_int set_wf equal-wf-T-base int_seg_wf extd-nameset-nil name-morph-flip_wf cat-ob_wf list_wf small-category_wf le_reflexive and_wf poset-cat_wf extd-nameset_wf assert_wf isname_wf subtype_rel_wf cat-id_wf iff_weakening_equal poset_functor_extend_id
Rules used in proof :  sqequalSubstitution sqequalTransitivity computationStep sqequalReflexivity lambdaFormation isect_memberFormation introduction cut applyEquality thin lambdaEquality sqequalHypSubstitution imageElimination extract_by_obid isectElimination hypothesisEquality equalityTransitivity hypothesis equalitySymmetry universeEquality functionExtensionality because_Cache sqequalRule independent_isectElimination setElimination rename functionEquality natural_numberEquality baseClosed dependent_functionElimination hyp_replacement dependent_set_memberEquality independent_pairFormation applyLambdaEquality productElimination setEquality imageMemberEquality independent_functionElimination isect_memberEquality axiomEquality

Latex:
\mforall{}C:SmallCategory.  \mforall{}I:Cname  List.  \mforall{}L:name-morph(I;[])  {}\mrightarrow{}  cat-ob(C).  \mforall{}E:i:nameset(I)
                                                                                                                                            {}\mrightarrow{}  c:\{c:name-morph(I;[])| 
                                                                                                                                                        (c  i)  =  0\} 
                                                                                                                                            {}\mrightarrow{}  (cat-arrow(C)  (L  c) 
                                                                                                                                                    (L  flip(c;i))).
\mforall{}x:cat-ob(poset-cat(I)).
    \mforall{}[y:cat-ob(poset-cat(I))].  poset\_functor\_extend(C;I;L;E;x;y)  =  (cat-id(C)  (L  x))  supposing  x  =  y



Date html generated: 2017_10_05-AM-10_30_57
Last ObjectModification: 2017_07_28-AM-11_24_37

Theory : cubical!sets


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