Step * 1 1 of Lemma eu-ab-eq-x

.....assertion..... 
1. EuclideanPlane@i'
2. Point@i
3. Point@i
4. b ∈ Point@i
⊢ |aa| |ab| ∈ {p:Point| O_X_p} 
BY
Auto }


Latex:


Latex:
.....assertion..... 
1.  e  :  EuclideanPlane@i'
2.  a  :  Point@i
3.  b  :  Point@i
4.  a  =  b@i
\mvdash{}  |aa|  =  |ab|


By


Latex:
Auto




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