Nuprl Lemma : fpf-compatible-singles-trivial
∀[A:Type]. ∀[eq:EqDecider(A)]. ∀[B:Top]. ∀[x,y:A]. ∀[v,u:Top]. x : v || y : u supposing ¬(x = y ∈ A)
Proof
Definitions occuring in Statement :
fpf-single: x : v,
fpf-compatible: f || g,
deq: EqDecider(T),
uimplies: b supposing a,
uall: ∀[x:A]. B[x],
top: Top,
so_apply: x[s],
not: ¬A,
universe: Type,
equal: s = t ∈ T
Definitions unfolded in proof :
fpf-compatible: f || g,
all: ∀x:A. B[x],
implies: P ⇒ Q,
not: ¬A,
fpf-single: x : v,
fpf-dom: x ∈ dom(f),
pi1: fst(t),
member: t ∈ T,
top: Top,
false: False,
prop: ℙ,
and: P ∧ Q,
uall: ∀[x:A]. B[x],
so_lambda: λ2x.t[x],
so_apply: x[s],
or: P ∨ Q,
uimplies: b supposing a,
eqof: eqof(d),
iff: P ⇐⇒ Q,
uiff: uiff(P;Q),
assert: ↑b,
ifthenelse: if b then t else f fi ,
bfalse: ff,
rev_implies: P ⇐ Q
Lemmas referenced :
deq_member_cons_lemma,
deq_member_nil_lemma,
assert_wf,
fpf-dom_wf,
fpf-single_wf,
top_wf,
bor_wf,
eqof_wf,
bfalse_wf,
or_wf,
equal_wf,
false_wf,
not_wf,
deq_wf,
iff_transitivity,
iff_weakening_uiff,
assert_of_bor,
safe-assert-deq
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
lambdaFormation,
sqequalHypSubstitution,
independent_functionElimination,
thin,
sqequalRule,
cut,
introduction,
extract_by_obid,
dependent_functionElimination,
isect_memberEquality,
voidElimination,
voidEquality,
hypothesis,
productEquality,
isectElimination,
cumulativity,
hypothesisEquality,
instantiate,
lambdaEquality,
because_Cache,
applyEquality,
productElimination,
unionElimination,
equalityTransitivity,
equalitySymmetry,
universeEquality,
isect_memberFormation,
axiomEquality,
addLevel,
independent_pairFormation,
orFunctionality,
independent_isectElimination,
levelHypothesis,
promote_hyp,
andLevelFunctionality
Latex:
\mforall{}[A:Type]. \mforall{}[eq:EqDecider(A)]. \mforall{}[B:Top]. \mforall{}[x,y:A]. \mforall{}[v,u:Top]. x : v || y : u supposing \mneg{}(x = y)
Date html generated:
2018_05_21-PM-09_28_57
Last ObjectModification:
2018_02_09-AM-10_24_04
Theory : finite!partial!functions
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