Step * of Lemma eu-length-flip

e:EuclideanPlane. ∀[a,b:Point].  (|ab| |ba| ∈ {p:Point| O_X_p} )
BY
(Auto THEN EqTypeCD THEN Auto) }

1
1. EuclideanPlane@i'
2. Point
3. Point
⊢ |ab| |ba| ∈ Point


Latex:


Latex:
\mforall{}e:EuclideanPlane.  \mforall{}[a,b:Point].    (|ab|  =  |ba|)


By


Latex:
(Auto  THEN  EqTypeCD  THEN  Auto)




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