Entry Value
Package Name list-filter-thm
Count 7
Theorems
  • ALL_FILTER : !p q l. ALL p (FILTER q l) <=> ALL (\x. q x ==> p x) l
  • EX_FILTER : !p q l. EX p (FILTER q l) <=> EX (\x. q x /\ p x) l
  • FILTER_APPEND : !p l1 l2. FILTER p (APPEND l1 l2) = APPEND (FILTER p l1) (FILTER p l2)
  • FILTER_MAP : !p f l. FILTER p (MAP f l) = MAP f (FILTER (p o f) l)
  • LENGTH_FILTER : !p l. LENGTH (FILTER p l) <= LENGTH l
  • MEM_FILTER : !p l x. MEM x (FILTER p l) <=> MEM x l /\ p x
  • SET_OF_LIST_FILTER : !p l. set_of_list (FILTER p l) = set_of_list l DIFF {x | ~p x}
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