Step
*
1
of Lemma
eu-not-colinear-OXY
1. e : EuclideanStructure
2. v : {triple:Point × Point × Point| let a,b,c = triple in (¬(a = b ∈ Point)) ∧ (¬Colinear(a;b;c))} @i
3. eu-nontrivial(e)
= v
∈ {triple:Point × Point × Point| let a,b,c = triple in (¬(a = b ∈ Point)) ∧ (¬Colinear(a;b;c))} @i
⊢ (¬((fst(v)) = (fst(snd(v))) ∈ Point)) ∧ (¬Colinear(fst(v);fst(snd(v));snd(snd(v))))
BY
{ ((D 0 THENA Auto) THEN RepeatFor 2 (D 2) THEN D 3 THEN All Reduce THEN Auto) }
Latex:
Latex:
1. e : EuclideanStructure
2. v : \{triple:Point \mtimes{} Point \mtimes{} Point| let a,b,c = triple in (\mneg{}(a = b)) \mwedge{} (\mneg{}Colinear(a;b;c))\} @i
3. eu-nontrivial(e) = v@i
\mvdash{} (\mneg{}((fst(v)) = (fst(snd(v))))) \mwedge{} (\mneg{}Colinear(fst(v);fst(snd(v));snd(snd(v))))
By
Latex:
((D 0 THENA Auto) THEN RepeatFor 2 (D 2) THEN D 3 THEN All Reduce THEN Auto)
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