Step * 1 of Lemma perp-col

.....assertion..... 
1. BasicGeometry
2. Point
3. Point
4. Point
5. Point
6. Point
7. Point
8. a ≠ b
9. Colinear(a;b;x)
10. Colinear(c;d;x)
11. ∀u,v:Point.  (Colinear(a;b;u)  Colinear(c;d;v)  Ruxv)
12. x ≠ y
13. Colinear(a;b;x)
14. Colinear(a;b;y)
⊢ Colinear(a;x;y)
BY
(InstLemma `colinear-transitivity-2` [⌜e⌝;⌜a⌝;⌜b⌝;⌜x⌝;⌜y⌝]⋅ THEN Auto) }


Latex:


Latex:
.....assertion..... 
1.  e  :  BasicGeometry
2.  a  :  Point
3.  b  :  Point
4.  c  :  Point
5.  d  :  Point
6.  x  :  Point
7.  y  :  Point
8.  a  \mneq{}  b
9.  Colinear(a;b;x)
10.  Colinear(c;d;x)
11.  \mforall{}u,v:Point.    (Colinear(a;b;u)  {}\mRightarrow{}  Colinear(c;d;v)  {}\mRightarrow{}  Ruxv)
12.  x  \mneq{}  y
13.  Colinear(a;b;x)
14.  Colinear(a;b;y)
\mvdash{}  Colinear(a;x;y)


By


Latex:
(InstLemma  `colinear-transitivity-2`  [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}x\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{}]\mcdot{}  THEN  Auto)




Home Index