---

Step * of Lemma geo-strict-between-trans

∀e:BasicGeometry-. ∀a,b,c,d:Point.  (a-b-d ⇒ b-c-d ⇒ a-b-c)
BY
{ (Auto THEN D 1 THEN (Unhide THENA Auto) THEN All (Unfold `geo-strict-between`) THEN Auto THEN D 2 THEN Auto) }

---

Latex:

---

Latex:
\mforall{}e:BasicGeometry-.  \mforall{}a,b,c,d:Point.    (a-b-d  {}\mRightarrow{}  b-c-d  {}\mRightarrow{}  a-b-c)


By

---

Latex:
(Auto
  THEN  D  1
  THEN  (Unhide  THENA  Auto)
  THEN  All  (Unfold  `geo-strict-between`)
  THEN  Auto
  THEN  D  2
  THEN  Auto)

---

Home Index