Nuprl Lemma : face-0-or
∀[X:j⊢]. ∀[psi:{X ⊢ _:𝔽}]. ((0(𝔽) ∨ psi) = psi ∈ {X ⊢ _:𝔽})
Proof
Definitions occuring in Statement :
face-or: (a ∨ b),
face-0: 0(𝔽),
face-type: 𝔽,
cubical-term: {X ⊢ _:A},
cubical_set: CubicalSet,
uall: ∀[x:A]. B[x],
equal: s = t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
face-0: 0(𝔽),
face-or: (a ∨ b),
cubical-term-at: u(a),
member: t ∈ T,
subtype_rel: A ⊆r B,
cubical-type-at: A(a),
pi1: fst(t),
face-type: 𝔽,
constant-cubical-type: (X),
I_cube: A(I),
functor-ob: ob(F),
face-presheaf: 𝔽,
lattice-point: Point(l),
record-select: r.x,
face_lattice: face_lattice(I),
face-lattice: face-lattice(T;eq),
free-dist-lattice-with-constraints: free-dist-lattice-with-constraints(T;eq;x.Cs[x]),
constrained-antichain-lattice: constrained-antichain-lattice(T;eq;P),
mk-bounded-distributive-lattice: mk-bounded-distributive-lattice,
mk-bounded-lattice: mk-bounded-lattice(T;m;j;z;o),
record-update: r[x := v],
ifthenelse: if b then t else f fi ,
eq_atom: x =a y,
bfalse: ff,
btrue: tt,
bdd-distributive-lattice: BoundedDistributiveLattice,
so_lambda: λ2x.t[x],
prop: ℙ,
and: P ∧ Q,
so_apply: x[s],
uimplies: b supposing a
Lemmas referenced :
lattice-join-0,
face_lattice_wf,
bdd-distributive-lattice-subtype-bdd-lattice,
cubical-term-at_wf,
face-type_wf,
subtype_rel_self,
lattice-point_wf,
subtype_rel_set,
bounded-lattice-structure_wf,
lattice-structure_wf,
lattice-axioms_wf,
bounded-lattice-structure-subtype,
bounded-lattice-axioms_wf,
equal_wf,
lattice-meet_wf,
lattice-join_wf,
I_cube_wf,
fset_wf,
nat_wf,
cubical-term-equal,
face-or_wf,
face-0_wf,
cubical-term_wf,
cubical_set_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation_alt,
cut,
functionExtensionality,
sqequalRule,
introduction,
extract_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
hypothesisEquality,
hypothesis,
applyEquality,
instantiate,
lambdaEquality_alt,
productEquality,
cumulativity,
isectEquality,
because_Cache,
universeIsType,
independent_isectElimination,
productElimination,
equalityTransitivity,
equalitySymmetry
Latex:
\mforall{}[X:j\mvdash{}]. \mforall{}[psi:\{X \mvdash{} \_:\mBbbF{}\}]. ((0(\mBbbF{}) \mvee{} psi) = psi)
Date html generated:
2020_05_20-PM-02_41_58
Last ObjectModification:
2020_04_04-PM-04_50_11
Theory : cubical!type!theory
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