Step
*
1
2
1
1
of Lemma
geo-lt-iff-strict-between-points
1. g : EuclideanPlane
2. p : {p:Point| B(OXp)}
3. q : {p:Point| B(OXp)}
4. [%] : ∃p',q':{p:Point| B(OXp)} . ((p' = p ∈ Length) ∧ (q' = q ∈ Length) ∧ B(Xp'q'))
5. p # q
⊢ ∃a,b:Point. (a # b ∧ p + |ab| ≤ q)
BY
{ (InstConcl [⌜p⌝;⌜q⌝]⋅ THEN Auto) }
1
1. g : EuclideanPlane
2. p : {p:Point| B(OXp)}
3. q : {p:Point| B(OXp)}
4. [%] : ∃p',q':{p:Point| B(OXp)} . ((p' = p ∈ Length) ∧ (q' = q ∈ Length) ∧ B(Xp'q'))
5. p # q
6. p # q
⊢ p + |pq| ≤ q
Latex:
Latex:
1. g : EuclideanPlane
2. p : \{p:Point| B(OXp)\}
3. q : \{p:Point| B(OXp)\}
4. [\%] : \mexists{}p',q':\{p:Point| B(OXp)\} . ((p' = p) \mwedge{} (q' = q) \mwedge{} B(Xp'q'))
5. p \# q
\mvdash{} \mexists{}a,b:Point. (a \# b \mwedge{} p + |ab| \mleq{} q)
By
Latex:
(InstConcl [\mkleeneopen{}p\mkleeneclose{};\mkleeneopen{}q\mkleeneclose{}]\mcdot{} THEN Auto)
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