Step
*
1
1
1
of Lemma
free-dl-1-join-irreducible
.....assertion..... 
1. T : Type@i'
2. eq : EqDecider(T)@i
3. x : Point(free-dist-lattice(T; eq))@i
4. y : Point(free-dist-lattice(T; eq))@i
5. {} ∈ x ∨ y
⊢ {} ∈ x ∨ {} ∈ y
BY
{ ((RWO "free-dl-join" (-1) THENA Auto) THEN (All (RWO "free-dl-point") THENA Auto)) }
1
1. T : Type@i'
2. eq : EqDecider(T)@i
3. x : {ac:fset(fset(T))| ↑fset-antichain(eq;ac)} @i
4. y : {ac:fset(fset(T))| ↑fset-antichain(eq;ac)} @i
5. {} ∈ fset-ac-lub(eq;x;y)
⊢ {} ∈ x ∨ {} ∈ y
Latex:
Latex:
.....assertion..... 
1.  T  :  Type@i'
2.  eq  :  EqDecider(T)@i
3.  x  :  Point(free-dist-lattice(T;  eq))@i
4.  y  :  Point(free-dist-lattice(T;  eq))@i
5.  \{\}  \mmember{}  x  \mvee{}  y
\mvdash{}  \{\}  \mmember{}  x  \mvee{}  \{\}  \mmember{}  y
By
Latex:
((RWO  "free-dl-join"  (-1)  THENA  Auto)  THEN  (All  (RWO  "free-dl-point")  THENA  Auto))
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