# [texhax] A Question

Phil Parker phil at math.twsu.edu
Thu Jul 17 04:52:47 CEST 2003

```On 07/16/2003 at 10:46 AM, "Robert Sherry" <rsherry8 at comcast.net> wrote:

>   In logic, a vertical bar or hat sign is often placed on top of a
>variable to indicate
>the not operator. Could somebody please tell me how to do this in
>LaTex/Tex?

Try prefixing with \not to get the mathematical standard, which is slightly angled instead of perfectly vertical. The hat can be done as a math accent.

--
Phil Parker
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URL http://www.math.twsu.edu/Faculty/Parker/
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