EECS20N: Signals and Systems


  • A particular element in a set is referenced by the name of the element, e.g., the element 55 in Naturals
  • A general or generic element is referenced by a variable name or variable, e.g.

    n Naturals, name Students, city USCities, x Naturals

    we say: n is a variable over Naturals or the range of n is Naturals

  • A variable can be assigned any value in its range, e.g.
n = 5, city = Berkeley