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Math Help - Vertical lines

  1. #1
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    Vertical lines

    I already know how to do horizontal lines. It seems like the keyboard is supposed to have a symbol for vertical lines which I don't see. Any suggestions?
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  2. #2
    A Plied Mathematician
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    Usually it's the key right above the Enter key. Hold down shift + that key. You should get "|" as a result.
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  3. #3
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    Nice. The key shows it as a broken line (darn library), but it works.
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  4. #4
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    Since this is a LaTeX forum, I thought I'd share this. I read recently that there are three ways to type a vertical bar in LaTeX: | (synonym: \vert), \lvert and \rvert, and \mid. The first produces an ordinary math symbol like letters and digits (class \mathord); the second makes opening and closing delimiters (\mathopen and \mathclose), and the third produces a binary relation (\mathrel). Each class is inserts its own spaces. For example, there is a thin space \, between an ordinary symbol and an operator, but no space between an opening delimiter and an operator: compare |\sin x| and \lvert\sin x\rvert. The relation \mid is good for set notation \{x\in\mathbb{N}\mid x<5\} and to denote divisibility.
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  5. #5
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    Here are more ways to do this.

    [tex] \left|\sin(x)\right| [/tex] gives  \left| \sin(x)\right|

    [tex] \left\|\sin(x)\right\| [/tex] gives  \left\| \sin(x)\right\|
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