,UNION 7OF SETS7 ,EXAMPLES

#1_4 ,A UNION ;,B IS WRITT5
  ,A.+,B
#2_4 ;,C UNION ;,D EQUALS ! SET
  )! ELE;TS "O1 TWO1 ?REE1 F\R1
  & FIVE IS WRITT5
  ,C.+,D .K .(1, 2, 3, 4, 5.)
#3_4 ,A UNION ;,B EQUALS ! SET (
  ALL ;X S* T ;X IS AN ELE;T (
  ,A OR ;X IS AN ELE;T ( ;,B IS
  WRITT5
  ,A.+,B .K
    .(X "1 X @E ,A OR X @E ,B.)










                              #A