Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What are these functions called?

  1. Sep 24, 2007 #1
    Is there any name for the functions for which [tex]|f(x+y)| \leq |f(x)| + |f(y)|[/tex]?
     
  2. jcsd
  3. Sep 24, 2007 #2
    Look up "subadditive".
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook