Step
*
1
of Lemma
setmem-intersectionset
1. s : coSet{i:l}
2. x : coSet{i:l}
3. ∃a:coSet{i:l}. (a ∈ s)
⊢ (x ∈ ⋃(s)) ∧ ∀z∈s.(x ∈ z)
⇐⇒ ∀z:coSet{i:l}. ((z ∈ s)
⇒ (x ∈ z))
BY
{ ((RWO "setmem-unionset" 0 THENA Auto) THEN RWO "allsetmem-iff" 0 THEN Auto) }
Latex:
Latex:
1. s : coSet\{i:l\}
2. x : coSet\{i:l\}
3. \mexists{}a:coSet\{i:l\}. (a \mmember{} s)
\mvdash{} (x \mmember{} \mcup{}(s)) \mwedge{} \mforall{}z\mmember{}s.(x \mmember{} z) \mLeftarrow{}{}\mRightarrow{} \mforall{}z:coSet\{i:l\}. ((z \mmember{} s) {}\mRightarrow{} (x \mmember{} z))
By
Latex:
((RWO "setmem-unionset" 0 THENA Auto) THEN RWO "allsetmem-iff" 0 THEN Auto)
Home
Index