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Interval of Integration Symbol

  1. Sep 13, 2009 #1
    Latex Question:

    I am having a hell of a time finding how to put the large vertical bar used to denote the interval over which a definite integral should be evaluated. Can you please help me?
     
  2. jcsd
  3. Sep 13, 2009 #2

    D H

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    Science Advisor

    Usually you put those with the integral sign:

    \int_A^B f(x)\, dx

    [tex]\int_A^B f(x)\, dx[/tex]


    Once you have evaluated the corresponding indefinite integral you need to evaluate it at the integration limits to determine the value of the definite integral.

    \left.F(x)\right|_A^B

    [tex]\left.F(x)\right|_A^B[/tex]


    The trick is to use an invisible \left part (\left.) paired with a visible vertical bar \right part (\right|).



    An alternate approach is to use big honkin' elements. Getting bigr and Bigr and biggr and Biggr,

    F(x)\bigr|_A^B, F(x)\Bigr|_A^B, F(x)\biggr|_A^B, F(x)\Biggr|_A^B

    [tex]F(x)\bigr|_A^B[/tex]

    [tex]F(x)\Bigr|_A^B[/tex]

    [tex]F(x)\biggr|_A^B[/tex]

    [tex]F(x)\Biggr|_A^B[/tex]
     
  4. Sep 13, 2009 #3
    Thank you very much! It looks great!

    I was very surprised this wasn't actually detailed somewhere already. In my searching I also learned about the cancel package, which you can use to show expressions canceling to zero or one or whatever!
     
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