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Quick Function Question

  1. Oct 13, 2007 #1
    What is exactly the difference between [tex]f[/tex] and [tex]f(n)[/tex] and why can't we write [tex](f \circ g)(n)[/tex] as [tex]f(n) \circ g(n)[/tex]?
    Last edited: Oct 13, 2007
  2. jcsd
  3. Oct 13, 2007 #2
    f is the function, f(n) is the value of the function at the point n. The ball operator [tex]\circ[/tex] acts on functions, not values, so your second expression is wrong.
  4. Oct 14, 2007 #3
    You can, however, write it as f(g(n)).
  5. Oct 15, 2007 #4
    u can write it
    no proplem.........i thenk
    Last edited by a moderator: Oct 15, 2007
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