Step * of Lemma heyting-not-not-inner-pasch

e:HeytingGeometry. ∀a,b,c:Point. ∀p:{p:Point| a_p_c} . ∀q:{q:Point| b_q_c} .  (¬¬(∃x:Point. (p_x_b ∧ q_x_a)))
BY
(InstLemma `not-not-inner-pasch` [] THEN NthHypSq (-1) THEN EqCD THEN Auto THEN ByComputation 0) }


Latex:


Latex:
\mforall{}e:HeytingGeometry.  \mforall{}a,b,c:Point.  \mforall{}p:\{p:Point|  a\_p\_c\}  .  \mforall{}q:\{q:Point|  b\_q\_c\}  .
    (\mneg{}\mneg{}(\mexists{}x:Point.  (p\_x\_b  \mwedge{}  q\_x\_a)))


By


Latex:
(InstLemma  `not-not-inner-pasch`  []  THEN  NthHypSq  (-1)  THEN  EqCD  THEN  Auto  THEN  ByComputation  0)




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