---

Step * of Lemma subtype_rel_algebra

∀A1,A2:Type.  ((A1 ⊆r A2) ⇒ (algebra_sig{i:l}(A2) ⊆r algebra_sig{[i | j]:l}(A1)))
BY
{ (Unfold `algebra_sig` 0 THEN Auto) }

---

Latex:

---

Latex:
\mforall{}A1,A2:Type.    ((A1  \msubseteq{}r  A2)  {}\mRightarrow{}  (algebra\_sig\{i:l\}(A2)  \msubseteq{}r  algebra\_sig\{[i  |  j]:l\}(A1)))


By

---

Latex:
(Unfold  `algebra\_sig`  0  THEN  Auto)

---

Home Index