Step * 2 1 1 of Lemma geo-sum-eq-x


1. BasicGeometry
2. Point
3. |aa| X ∈ Length
4. Point
5. Point
6. Point
7. |ab| |cd| ∈ Length
8. |cd| |cc| ∈ Length supposing |cd| ≤ |cc|
9. |cd| ≤ |cc| supposing |cd| |cc| ∈ Length
⊢ |cd| ≤ X
BY
InstLemma `geo-add-length-comm` [⌜e⌝;⌜|ab|⌝;⌜|cd|⌝]⋅
THEN Auto }

1
1. BasicGeometry
2. Point
3. |aa| X ∈ Length
4. Point
5. Point
6. Point
7. |ab| |cd| ∈ Length
8. |cd| |cc| ∈ Length supposing |cd| ≤ |cc|
9. |cd| ≤ |cc| supposing |cd| |cc| ∈ Length
10. |ab| |cd| |cd| |ab| ∈ Length
⊢ |cd| ≤ X


Latex:


Latex:

1.  e  :  BasicGeometry
2.  a  :  Point
3.  |aa|  =  X
4.  b  :  Point
5.  c  :  Point
6.  d  :  Point
7.  X  =  |ab|  +  |cd|
8.  |cd|  =  |cc|  supposing  |cd|  \mleq{}  |cc|
9.  |cd|  \mleq{}  |cc|  supposing  |cd|  =  |cc|
\mvdash{}  |cd|  \mleq{}  X


By


Latex:
InstLemma  `geo-add-length-comm`  [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}|ab|\mkleeneclose{};\mkleeneopen{}|cd|\mkleeneclose{}]\mcdot{}
THEN  Auto




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