Step
*
1
of Lemma
2opp-side-implies-same-side
1. e : BasicGeometry
2. a : Point
3. c : Point
4. d : Point
5. p : Point
6. q : Point
7. geo-tar-opp-side(e;a;d;p;q)
8. geo-tar-opp-side(e;c;d;p;q)
9. a ≠ c
⊢ geo-tar-same-side(e;a;c;p;q)
BY
{ (Unfold `geo-tar-same-side` 0 THEN InstConcl [⌜d⌝]⋅ THEN Auto) }
Latex:
Latex:
1. e : BasicGeometry
2. a : Point
3. c : Point
4. d : Point
5. p : Point
6. q : Point
7. geo-tar-opp-side(e;a;d;p;q)
8. geo-tar-opp-side(e;c;d;p;q)
9. a \mneq{} c
\mvdash{} geo-tar-same-side(e;a;c;p;q)
By
Latex:
(Unfold `geo-tar-same-side` 0 THEN InstConcl [\mkleeneopen{}d\mkleeneclose{}]\mcdot{} THEN Auto)
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