Step * 1 of Lemma lsep-iff-all-sep


1. EuclideanPlane
2. Point
3. Point
4. Point
5. bc
6. Point
7. Colinear(x;b;c)
⊢ a ≠ x
BY
((InstLemma `lsep-colinear-sep` [⌜g⌝;⌜a⌝;⌜b⌝;⌜c⌝]⋅ THENA Auto) THEN InstHyp [⌜x⌝(-1)⋅ THEN Auto) }


Latex:


Latex:

1.  g  :  EuclideanPlane
2.  a  :  Point
3.  b  :  Point
4.  c  :  Point
5.  a  \#  bc
6.  x  :  Point
7.  Colinear(x;b;c)
\mvdash{}  a  \mneq{}  x


By


Latex:
((InstLemma  `lsep-colinear-sep`  [\mkleeneopen{}g\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}c\mkleeneclose{}]\mcdot{}  THENA  Auto)  THEN  InstHyp  [\mkleeneopen{}x\mkleeneclose{}]  (-1)\mcdot{}  THEN  Auto)




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