Step * 1 1 1 of Lemma stable__geo-le


1. BasicGeometry
2. {p:Point| O_X_p} 
3. {p:Point| O_X_p} 
4. ¬¬↓∃p',q':{p:Point| O_X_p} ((p' a ∈ Length) ∧ (q' b ∈ Length) ∧ X_p'_q')
5. a ∈ Length
6. b ∈ Length
⊢ X_a_b
BY
((DoubleNegation THENM ParallelOp 4) THENA Auto) }

1
1. BasicGeometry
2. {p:Point| O_X_p} 
3. {p:Point| O_X_p} 
4. a ∈ Length
5. b ∈ Length
6. ¬X_a_b
⊢ ¬↓∃p',q':{p:Point| O_X_p} ((p' a ∈ Length) ∧ (q' b ∈ Length) ∧ X_p'_q')


Latex:


Latex:

1.  e  :  BasicGeometry
2.  a  :  \{p:Point|  O\_X\_p\} 
3.  b  :  \{p:Point|  O\_X\_p\} 
4.  \mneg{}\mneg{}\mdownarrow{}\mexists{}p',q':\{p:Point|  O\_X\_p\}  .  ((p'  =  a)  \mwedge{}  (q'  =  b)  \mwedge{}  X\_p'\_q')
5.  a  \mmember{}  Length
6.  b  \mmember{}  Length
\mvdash{}  X\_a\_b


By


Latex:
((DoubleNegation  THENM  ParallelOp  4)  THENA  Auto)




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