Step * of Lemma right-angle-colinear2

e:BasicGeometry. ∀a,b,c,c':Point.  (Rabc  c ≠  Colinear(b;c;c')  Rabc')
BY
(Auto THEN (gSeparatedCases ⌜a⌝ ⌜b⌝⋅ THENA Auto)) }

1
1. BasicGeometry
2. Point
3. Point
4. Point
5. c' Point
6. Rabc
7. c ≠ b
8. Colinear(b;c;c')
9. a ≠ b
⊢ Rabc'

2
1. BasicGeometry
2. Point
3. Point
4. Point
5. c' Point
6. Rbbc
7. c ≠ b
8. Colinear(b;c;c')
9. a ≡ b
⊢ Rbbc'


Latex:


Latex:
\mforall{}e:BasicGeometry.  \mforall{}a,b,c,c':Point.    (Rabc  {}\mRightarrow{}  c  \mneq{}  b  {}\mRightarrow{}  Colinear(b;c;c')  {}\mRightarrow{}  Rabc')


By


Latex:
(Auto  THEN  (gSeparatedCases  \mkleeneopen{}a\mkleeneclose{}  \mkleeneopen{}b\mkleeneclose{}\mcdot{}  THENA  Auto))




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