Nuprl Lemma : two-implies-quotient-true
∀[P,Q,R:ℙ]. ((P ⇒ Q ⇒ R) ⇒ {⇃(P) ⇒ ⇃(Q) ⇒ ⇃(R)})
Proof
Definitions occuring in Statement :
quotient: x,y:A//B[x; y],
uall: ∀[x:A]. B[x],
prop: ℙ,
guard: {T},
implies: P ⇒ Q,
true: True
Definitions unfolded in proof :
guard: {T},
uall: ∀[x:A]. B[x],
implies: P ⇒ Q,
member: t ∈ T,
prop: ℙ,
so_lambda: λ2x y.t[x; y],
so_apply: x[s1;s2],
uimplies: b supposing a,
quotient: x,y:A//B[x; y],
and: P ∧ Q,
all: ∀x:A. B[x],
subtype_rel: A ⊆r B,
true: True
Lemmas referenced :
quotient_wf,
true_wf,
equiv_rel_true,
quotient-member-eq,
equal-wf-base
Rules used in proof :
sqequalSubstitution,
sqequalRule,
sqequalReflexivity,
sqequalTransitivity,
computationStep,
isect_memberFormation,
lambdaFormation,
rename,
introduction,
pointwiseFunctionalityForEquality,
cut,
lemma_by_obid,
sqequalHypSubstitution,
isectElimination,
thin,
cumulativity,
hypothesisEquality,
lambdaEquality,
hypothesis,
because_Cache,
independent_isectElimination,
pertypeElimination,
productElimination,
dependent_functionElimination,
applyEquality,
functionEquality,
independent_functionElimination,
natural_numberEquality,
productEquality,
universeEquality
Latex:
\mforall{}[P,Q,R:\mBbbP{}]. ((P {}\mRightarrow{} Q {}\mRightarrow{} R) {}\mRightarrow{} \{\00D9(P) {}\mRightarrow{} \00D9(Q) {}\mRightarrow{} \00D9(R)\})
Date html generated:
2016_05_14-AM-06_08_51
Last ObjectModification:
2015_12_26-AM-11_48_23
Theory : quot_1
Home
Index