---

Step * 1 of Lemma quotient-top-union-top


1. ⇃(Top + Top) ⋂ Base ≡ Top + Top ⋂ Base
⊢ ⇃(Top + Top) ⋂ Base ⊆r (Top + Top)
BY
{ (RWO  "-1" 0 THEN Auto) }

---

Latex:

---

Latex:

1.  \00D9(Top  +  Top)  \mcap{}  Base  \mequiv{}  Top  +  Top  \mcap{}  Base
\mvdash{}  \00D9(Top  +  Top)  \mcap{}  Base  \msubseteq{}r  (Top  +  Top)


By

---

Latex:
(RWO    "-1"  0  THEN  Auto)

---

Home Index