Step * 1 1 of Lemma implies-le-face-lattice-join3


1. Type@i'
2. eq EqDecider(T)@i
3. Point(face-lattice(T;eq)) ⊆fset(fset(T T))
4. Point(face-lattice(T;eq))@i
5. Point(face-lattice(T;eq))@i
6. Point(face-lattice(T;eq))@i
7. Point(face-lattice(T;eq))@i
8. ∀s:fset(T T)
     (s ∈ z
      ((↑ac-covers(union-deq(T;T;eq;eq);u;s))
        ∨ (↑ac-covers(union-deq(T;T;eq;eq);x;s))
        ∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))))@i
9. fset(T T)@i
10. s ∈ z@i
11. (↑ac-covers(union-deq(T;T;eq;eq);u;s))
∨ (↑ac-covers(union-deq(T;T;eq;eq);x;s))
∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))
⊢ ↑ac-covers(union-deq(T;T;eq;eq);u ∨ x ∨ y;s)
BY
(Unfold `face-lattice` THEN (RWW  "free-dlwc-join" THENA Auto)) }

1
1. Type@i'
2. eq EqDecider(T)@i
3. Point(face-lattice(T;eq)) ⊆fset(fset(T T))
4. Point(face-lattice(T;eq))@i
5. Point(face-lattice(T;eq))@i
6. Point(face-lattice(T;eq))@i
7. Point(face-lattice(T;eq))@i
8. ∀s:fset(T T)
     (s ∈ z
      ((↑ac-covers(union-deq(T;T;eq;eq);u;s))
        ∨ (↑ac-covers(union-deq(T;T;eq;eq);x;s))
        ∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))))@i
9. fset(T T)@i
10. s ∈ z@i
11. (↑ac-covers(union-deq(T;T;eq;eq);u;s))
∨ (↑ac-covers(union-deq(T;T;eq;eq);x;s))
∨ (↑ac-covers(union-deq(T;T;eq;eq);y;s))
⊢ ↑ac-covers(union-deq(T;T;eq;
                       eq);lub(λs.fset-contains-none(union-deq(T;T;eq;
                                                               eq);s;x.face-lattice-constraints(x));u;lub(...;x;y));s)


Latex:


Latex:

1.  T  :  Type@i'
2.  eq  :  EqDecider(T)@i
3.  Point(face-lattice(T;eq))  \msubseteq{}r  fset(fset(T  +  T))
4.  u  :  Point(face-lattice(T;eq))@i
5.  x  :  Point(face-lattice(T;eq))@i
6.  y  :  Point(face-lattice(T;eq))@i
7.  z  :  Point(face-lattice(T;eq))@i
8.  \mforall{}s:fset(T  +  T)
          (s  \mmember{}  z
          {}\mRightarrow{}  ((\muparrow{}ac-covers(union-deq(T;T;eq;eq);u;s))
                \mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);x;s))
                \mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);y;s))))@i
9.  s  :  fset(T  +  T)@i
10.  s  \mmember{}  z@i
11.  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);u;s))
\mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);x;s))
\mvee{}  (\muparrow{}ac-covers(union-deq(T;T;eq;eq);y;s))
\mvdash{}  \muparrow{}ac-covers(union-deq(T;T;eq;eq);u  \mvee{}  x  \mvee{}  y;s)


By


Latex:
(Unfold  `face-lattice`  0  THEN  (RWW    "free-dlwc-join"  0  THENA  Auto))




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