Nuprl Lemma : sg-inv_wf
∀[sg:s-GroupStructure]. ∀[x:Point]. (x^-1 ∈ Point)
Proof
Definitions occuring in Statement :
s-group-structure: s-GroupStructure,
sg-inv: x^-1,
ss-point: Point,
uall: ∀[x:A]. B[x],
member: t ∈ T
Definitions unfolded in proof :
uall: ∀[x:A]. B[x],
member: t ∈ T,
s-group-structure: s-GroupStructure,
record+: record+,
record-select: r.x,
subtype_rel: A ⊆r B,
eq_atom: x =a y,
ifthenelse: if b then t else f fi ,
btrue: tt,
so_lambda: λ2x.t[x],
implies: P ⇒ Q,
prop: ℙ,
or: P ∨ Q,
so_apply: x[s],
all: ∀x:A. B[x],
sg-inv: x^-1
Lemmas referenced :
subtype_rel_self,
ss-point_wf,
all_wf,
ss-sep_wf,
or_wf,
s-group-structure_subtype1,
s-group-structure_wf
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
isect_memberFormation,
introduction,
cut,
sqequalHypSubstitution,
dependentIntersectionElimination,
sqequalRule,
dependentIntersectionEqElimination,
thin,
hypothesis,
applyEquality,
tokenEquality,
extract_by_obid,
isectElimination,
functionEquality,
lambdaEquality,
because_Cache,
functionExtensionality,
equalityTransitivity,
equalitySymmetry,
hypothesisEquality,
axiomEquality,
isect_memberEquality
Latex:
\mforall{}[sg:s-GroupStructure]. \mforall{}[x:Point]. (x\^{}-1 \mmember{} Point)
Date html generated:
2017_10_02-PM-03_24_30
Last ObjectModification:
2017_06_23-AM-11_11_43
Theory : constructive!algebra
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