Step
*
of Lemma
geo-le-pt-transitivity
∀e:BasicGeometry. ∀a,b,c,d,c',d':Point. (a ≠ b
⇒ ab≤cd
⇒ cd≤c'd'
⇒ ab≤c'd')
BY
{ ((Auto THEN All (Unfold `geo-le-pt`) THEN ExRepD)
THEN (InstLemma `geo-congruent-between-exists` [⌜e⌝;⌜c⌝;⌜y1⌝;⌜d⌝;⌜c'⌝;⌜y⌝]⋅ THENA Auto)
) }
1
1. e : BasicGeometry
2. a : Point
3. b : Point
4. c : Point
5. d : Point
6. c' : Point
7. d' : Point
8. a ≠ b
9. y1 : Point
10. c_y1_d
11. ab ≅ cy1
12. y : Point
13. c'_y_d'
14. cd ≅ c'y
15. ∃b':Point. (c'_b'_y ∧ cy1 ≅ c'b' ∧ y1d ≅ b'y)
⊢ ∃y:Point. (c'_y_d' ∧ ab ≅ c'y)
Latex:
Latex:
\mforall{}e:BasicGeometry. \mforall{}a,b,c,d,c',d':Point. (a \mneq{} b {}\mRightarrow{} ab\mleq{}cd {}\mRightarrow{} cd\mleq{}c'd' {}\mRightarrow{} ab\mleq{}c'd')
By
Latex:
((Auto THEN All (Unfold `geo-le-pt`) THEN ExRepD)
THEN (InstLemma `geo-congruent-between-exists` [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}c\mkleeneclose{};\mkleeneopen{}y1\mkleeneclose{};\mkleeneopen{}d\mkleeneclose{};\mkleeneopen{}c'\mkleeneclose{};\mkleeneopen{}y\mkleeneclose{}]\mcdot{} THENA Auto)
)
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