Step
*
1
1
1
of Lemma
geo-le-null-segment
1. e : BasicGeometry
2. p : Base
3. p1 : Base
4. p = p1 ∈ pertype(λx,y. ((x ∈ {p:Point| O_X_p} ) ∧ (y ∈ {p:Point| O_X_p} ) ∧ x ≡ y))
5. p ∈ {p:Point| O_X_p}
6. p1 ∈ {p:Point| O_X_p}
7. p ≡ p1
8. a : Point
9. {p:Point| O_X_p} ⊆r Length
10. p ≤ X
11. X ∈ Length
⊢ p = X ∈ Length
BY
{ (FLemma `geo-le_imp` [-2] THENA Auto) }
1
1. e : BasicGeometry
2. p : Base
3. p1 : Base
4. p = p1 ∈ pertype(λx,y. ((x ∈ {p:Point| O_X_p} ) ∧ (y ∈ {p:Point| O_X_p} ) ∧ x ≡ y))
5. p ∈ {p:Point| O_X_p}
6. p1 ∈ {p:Point| O_X_p}
7. p ≡ p1
8. a : Point
9. {p:Point| O_X_p} ⊆r Length
10. p ≤ X
11. X ∈ Length
12. X_p_X
⊢ p = X ∈ Length
Latex:
Latex:
1. e : BasicGeometry
2. p : Base
3. p1 : Base
4. p = p1
5. p \mmember{} \{p:Point| O\_X\_p\}
6. p1 \mmember{} \{p:Point| O\_X\_p\}
7. p \mequiv{} p1
8. a : Point
9. \{p:Point| O\_X\_p\} \msubseteq{}r Length
10. p \mleq{} X
11. X \mmember{} Length
\mvdash{} p = X
By
Latex:
(FLemma `geo-le\_imp` [-2] THENA Auto)
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