Step * of Lemma outer-pasch-strict

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e:EuclideanPlane. ∀a,b:Point. ∀c:{c:Point| B(abc)} . ∀x:Point. ∀y:{y:Point| b-x-y} .
  (x ab   (∃p:Point [(a-x-p ∧ c-p-y)]))
BY
(Auto THEN -2) }

1
1. EuclideanPlane
2. Point
3. Point
4. {c:Point| B(abc)} 
5. Point
6. {y:Point| b-x-y} 
7. leftof ab
8. c
⊢ ∃p:Point [(a-x-p ∧ c-p-y)]

2
1. EuclideanPlane
2. Point
3. Point
4. {c:Point| B(abc)} 
5. Point
6. {y:Point| b-x-y} 
7. leftof ba
8. c
⊢ ∃p:Point [(a-x-p ∧ c-p-y)]


Latex:


Latex:
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\mforall{}e:EuclideanPlane.  \mforall{}a,b:Point.  \mforall{}c:\{c:Point|  B(abc)\}  .  \mforall{}x:Point.  \mforall{}y:\{y:Point|  b-x-y\}  .
    (x  \#  ab  {}\mRightarrow{}  b  \#  c  {}\mRightarrow{}  (\mexists{}p:Point  [(a-x-p  \mwedge{}  c-p-y)]))


By


Latex:
(Auto  THEN  D  -2)




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