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Re: importance of tie bars?

From: Jacques Distler <distler@golem.ph.utexas.edu>
Date: Sat, 5 Jan 2008 01:05:22 -0600
Message-Id: <611069F2-2B65-4FCC-A79F-294C58192C0B@golem.ph.utexas.edu>
To: www-math@w3.org

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Yeah.

A similar use-case involves "Wick Contractions".

Differences are:

1) It's an "over-bracket", rather than an "under-bracket".
2) The Wick contraction typically doesn't sport a label (though, if  
one's building a general facility, there's no reason not to allow one).

In addition to not respecting the nesting structure of the equation,  
both tie-bars and Wick contractions can cross (i.e., they, themselves  
don't have a nested structure).

          ______________
         |              |
      ______________    |
     |   |          |   |
   < A   B   C   D  A   B   C   D >


Jacques
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Received on Saturday, 5 January 2008 07:05:34 GMT

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