1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What's the meaning of this symbol?

  1. Oct 17, 2007 #1
    Dear All:

    What's the meaning of a equal sign with a triangle over it please?

    Thanks in advance
  2. jcsd
  3. Oct 17, 2007 #2


    User Avatar
    Science Advisor

    I will confess that I did not recognize that immediately but according to Wikipedia:
    (down near the bottom of the page) it means "is defined as" or "is equal by definition".
    After seeing that definition, my reaction was, "Oh, yes, of course, I've seen that before".
    Different authors use different symbols for that.
  4. Jan 14, 2009 #3
    Dear All

    what is the meaning of these symbols =,<>,!=,>,<,!<,<=,!>
  5. Jan 14, 2009 #4


    User Avatar
    Science Advisor

    = means "is equal to"
    > means "is greater than"
    < means "is less than"
    <> means "is either less than or greater than" or simply "is not equal to"

    ! is a commonly used to mean "not"
    != means "is not equal to"
    !> means "is not greater than"
    !< means "is not less than"
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - What's meaning symbol Date
I What does this math symbol mean? R^4 |X SL(2,C) Oct 21, 2017
I What δ means? Jul 19, 2016
What does the word-final sigma symbol mean in maths? Nov 19, 2012
What does this symbol mean? Aug 26, 2012