Step * 1 2 1 2 of Lemma geo-add-length-between-iff

.....subterm..... T:t
3:n
1. BasicGeometry
2. Point
3. Point
4. Point
5. |ac| |ab| |bc| ∈ Length
6. a
7. c ≡ a
⊢ |ab| |ba| |ab| |bc| ∈ Length
BY
(Assert |ba| |bc| ∈ Length BY
         (BLemma `geo-length_functionality` THEN EAuto 1)) }

1
1. BasicGeometry
2. Point
3. Point
4. Point
5. |ac| |ab| |bc| ∈ Length
6. a
7. c ≡ a
8. |ba| |bc| ∈ Length
⊢ |ab| |ba| |ab| |bc| ∈ Length


Latex:


Latex:
.....subterm.....  T:t
3:n
1.  e  :  BasicGeometry
2.  a  :  Point
3.  b  :  Point
4.  c  :  Point
5.  |ac|  =  |ab|  +  |bc|
6.  b  \#  a
7.  c  \mequiv{}  a
\mvdash{}  |ab|  +  |ba|  =  |ab|  +  |bc|


By


Latex:
(Assert  |ba|  =  |bc|  BY
              (BLemma  `geo-length\_functionality`  THEN  EAuto  1))




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