Set + Set -- set union

Synopsis

• Operator: +

• Usage:

  x + y

• Inputs:
  • x, a set
  • y, a set
• Outputs:
  • a set, the union of x and y

Description

i1 : set{a,b,c} + set{a,d,f}

o1 = set {a, b, c, d, f}

o1 : Set

The function sum can be used to form the union of a list of sets, but this can be slow for long lists.

i2 : x = apply(3, i -> set apply(3, j -> 10*i+j))

o2 = {set {0, 1, 2}, set {10, 11, 12}, set {20, 21, 22}}

o2 : List

i3 : sum x

o3 = set {0, 1, 2, 10, 11, 12, 20, 21, 22}

o3 : Set

See also

• Set -- the class of all sets