Nuprl Lemma : geo-bisect-angle_wf
∀e:BasicGeometry. ∀a,b,c:Point. (geo-bisect-angle(e;a;b;c) ∈ ℙ)
Proof
Definitions occuring in Statement :
geo-bisect-angle: geo-bisect-angle(e;a;b;c),
basic-geometry: BasicGeometry,
geo-point: Point,
prop: ℙ,
all: ∀x:A. B[x],
member: t ∈ T
Definitions unfolded in proof :
exists: ∃x:A. B[x],
so_apply: x[s],
so_lambda: λ2x.t[x],
uimplies: b supposing a,
guard: {T},
subtype_rel: A ⊆r B,
uall: ∀[x:A]. B[x],
and: P ∧ Q,
prop: ℙ,
geo-bisect-angle: geo-bisect-angle(e;a;b;c),
member: t ∈ T,
all: ∀x:A. B[x]
Lemmas referenced :
geo-cong-angle_wf,
geo-point_wf,
exists_wf,
Error :basic-geo-primitives_wf,
Error :basic-geo-structure_wf,
basic-geometry_wf,
subtype_rel_transitivity,
basic-geometry-subtype,
geo-sep_wf
Rules used in proof :
lambdaEquality,
because_Cache,
independent_isectElimination,
instantiate,
hypothesis,
applyEquality,
hypothesisEquality,
thin,
isectElimination,
sqequalHypSubstitution,
extract_by_obid,
introduction,
productEquality,
sqequalRule,
cut,
lambdaFormation,
sqequalReflexivity,
computationStep,
sqequalTransitivity,
sqequalSubstitution
Latex:
\mforall{}e:BasicGeometry. \mforall{}a,b,c:Point. (geo-bisect-angle(e;a;b;c) \mmember{} \mBbbP{})
Date html generated:
2017_10_02-PM-06_24_19
Last ObjectModification:
2017_08_05-PM-04_18_20
Theory : euclidean!plane!geometry
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