Step * 1 1 1 1 1 of Lemma geo-sep-iff-or-lt


1. BasicGeometry
2. {p:Point| O_X_p} 
3. {p:Point| O_X_p} 
4. x ≠ y
5. O_x_y
6. X_x_y
7. |Xy| |Xx| |xy| ∈ Length
8. x ≠ y
⊢ |xy| ≤ y
BY
((D THEN InstConcl [⌜y⌝;⌜y⌝]⋅THEN Auto) }

1
1. BasicGeometry
2. {p:Point| O_X_p} 
3. {p:Point| O_X_p} 
4. x ≠ y
5. O_x_y
6. X_x_y
7. |Xy| |Xx| |xy| ∈ Length
8. x ≠ y
⊢ |xy| ∈ Length


Latex:


Latex:

1.  e  :  BasicGeometry
2.  x  :  \{p:Point|  O\_X\_p\} 
3.  y  :  \{p:Point|  O\_X\_p\} 
4.  x  \mneq{}  y
5.  O\_x\_y
6.  X\_x\_y
7.  |Xy|  =  |Xx|  +  |xy|
8.  x  \mneq{}  y
\mvdash{}  x  +  |xy|  \mleq{}  y


By


Latex:
((D  0  THEN  InstConcl  [\mkleeneopen{}y\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{}]\mcdot{})  THEN  Auto)




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