Nuprl Lemma : and_functionality_wrt_rev_uimplies
∀[P1,P2,Q1,Q2:ℙ]. ({rev_uimplies(P1;P2)} ⇒ {rev_uimplies(Q1;Q2)} ⇒ {rev_uimplies(P1 ∧ Q1;P2 ∧ Q2)})
Proof
Definitions occuring in Statement :
rev_uimplies: rev_uimplies(P;Q),
uall: ∀[x:A]. B[x],
prop: ℙ,
guard: {T},
implies: P ⇒ Q,
and: P ∧ Q
Definitions unfolded in proof :
guard: {T},
uall: ∀[x:A]. B[x],
implies: P ⇒ Q,
rev_uimplies: rev_uimplies(P;Q),
uimplies: b supposing a,
and: P ∧ Q,
cand: A c∧ B,
prop: ℙ,
member: t ∈ T
Lemmas referenced :
rev_uimplies_wf
Rules used in proof :
sqequalSubstitution,
sqequalRule,
sqequalReflexivity,
sqequalTransitivity,
computationStep,
Error :isect_memberFormation_alt,
lambdaFormation,
cut,
sqequalHypSubstitution,
hypothesis,
independent_isectElimination,
thin,
productElimination,
independent_pairFormation,
Error :productIsType,
Error :universeIsType,
hypothesisEquality,
introduction,
extract_by_obid,
isectElimination,
Error :inhabitedIsType,
universeEquality
Latex:
\mforall{}[P1,P2,Q1,Q2:\mBbbP{}].
(\{rev\_uimplies(P1;P2)\} {}\mRightarrow{} \{rev\_uimplies(Q1;Q2)\} {}\mRightarrow{} \{rev\_uimplies(P1 \mwedge{} Q1;P2 \mwedge{} Q2)\})
Date html generated:
2019_06_20-AM-11_14_14
Last ObjectModification:
2018_09_26-AM-10_41_50
Theory : core_2
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