Step 
*
 of Lemma 
sq_stable_eu-seg-congruent
∀e:EuclideanStructure. ∀[s1,s2:Segment].  SqStable(s1 ≡ s2)
BY
 
{ (Auto THEN RepUR ``eu-seg-congruent`` 0 THEN Auto) }
 
Latex: 
Latex:
\mforall{}e:EuclideanStructure.  \mforall{}[s1,s2:Segment].    SqStable(s1  \mequiv{}  s2)
 By 
Latex:
(Auto  THEN  RepUR  ``eu-seg-congruent``  0  THEN  Auto)
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