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

Denote a restricted function?

  1. Dec 22, 2008 #1

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    How does one denote a restricted function?

    For example, suppose I have a function [itex]F : \mathbb{R}\to\mathbb{R}[/itex], how would I denote a new function f, such that f is the restriction of F to the positive semi-axis? Up until this point I would have just said that f is the restriction of F to the positive semi-axis, but it occurs to me that there should be a more concise way of writing it.
     
  2. jcsd
  3. Dec 22, 2008 #2
    Re: Restriction

    f(x)=F(x) for only x positive real number, there's not a lot about it.
     
  4. Dec 22, 2008 #3
    Re: Restriction

    [tex]f\vert_S[/tex] is the standard notation for the restriction of f to a subset S of f's domain.
     
  5. Dec 22, 2008 #4

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: Restriction

    That's exactly was I was looking for Tac-Tics.

    Thanks to you both.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?