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Topic: latex question: norm and closure operator symbols
Replies: 4   Last Post: Jun 5, 2011 12:17 PM

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Porky Pig Jr

Posts: 1,535
Registered: 12/6/04
Re: latex question: norm and closure operator symbols
Posted: Jun 3, 2011 6:17 PM
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On Jun 3, 11:32 am, Matt <m...@themattfella.xxxyyz.com> wrote:
> I could define norm as a mapping from a vector space to the reals like:
>
> \| \cdot \|:


Better:

\| cdot \| \colon

The difference between : and \colon is spacing. Just check it out. In
you particular case, \colon is the most appropriate.

Regarding \bar vs \overline. \bar is fixed length. \overline is
extensible. So \bar{\cdot} will look nicer that \overline{\cdot}. But
you can pad \cdot with some extra spaces around, like:

\overline{\,\cdot\,}

So overline, in fact, is more flexible. You can choose the length most
pleasing to your heart. And yes, you need to use strut to push the
bar upward.






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