Nuprl Lemma : geo-between-implies-colinear
∀e:EuclideanPlane. ∀[a,b,c:Point].  Colinear(a;b;c) supposing B(abc)
Proof
Definitions occuring in Statement : 
euclidean-plane: EuclideanPlane, 
geo-colinear: Colinear(a;b;c), 
geo-between: B(abc), 
geo-point: Point, 
uimplies: b supposing a, 
uall: ∀[x:A]. B[x], 
all: ∀x:A. B[x]
Definitions unfolded in proof : 
all: ∀x:A. B[x], 
uall: ∀[x:A]. B[x], 
member: t ∈ T, 
uimplies: b supposing a, 
geo-colinear: Colinear(a;b;c), 
not: ¬A, 
implies: P ⇒ Q, 
subtype_rel: A ⊆r B, 
prop: ℙ, 
false: False, 
guard: {T}, 
geo-between: B(abc), 
and: P ∧ Q
Latex:
\mforall{}e:EuclideanPlane.  \mforall{}[a,b,c:Point].    Colinear(a;b;c)  supposing  B(abc)
Date html generated:
2020_05_20-AM-09_47_40
Last ObjectModification:
2019_11_13-PM-03_28_05
Theory : euclidean!plane!geometry
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