Nuprl Lemma : inconsistent-bool-eq2
uiff(ff = tt;False)
Proof
Definitions occuring in Statement :
bfalse: ff,
btrue: tt,
bool: 𝔹,
uiff: uiff(P;Q),
false: False,
equal: s = t ∈ T
Definitions unfolded in proof :
uiff: uiff(P;Q),
and: P ∧ Q,
uimplies: b supposing a,
member: t ∈ T,
false: False,
not: ¬A,
implies: P ⇒ Q,
prop: ℙ,
uall: ∀[x:A]. B[x]
Lemmas referenced :
btrue_neq_bfalse,
equal_wf,
bool_wf,
bfalse_wf,
btrue_wf,
false_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
independent_pairFormation,
isect_memberFormation,
introduction,
cut,
equalitySymmetry,
hypothesis,
thin,
lemma_by_obid,
sqequalHypSubstitution,
independent_functionElimination,
voidElimination,
sqequalRule,
isectElimination
Latex:
uiff(ff = tt;False)
Date html generated:
2016_05_15-PM-03_27_32
Last ObjectModification:
2015_12_27-PM-01_08_49
Theory : general
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