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From: aa318@FreeNet.Carleton.CA (John Coughlin)
Subject: Re: @ character
Message-ID: <D4ExFC.3B7@freenet.carleton.ca>
Sender: aa318@freenet3.carleton.ca (John Coughlin)
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References: <256947309wnr@shappski.demon.co.uk> <1995Feb12.105904.320@kuc01.kuniv.edu.kw>> <3hleh0$t8p@agate.berkeley.edu> <1995Feb14.122047.328@kuc01.kuniv.edu.kw> <1995Feb21.121908.11041@onionsnatcorp.ox.ac.uk>
Date: Wed, 22 Feb 1995 17:47:35 GMT
Lines: 12

In a previous posting, Andre Shapps (andre@shappski.demon.co.uk) writes:
> 
> "(" and ")" are sometimes known as "bra" and "ket" respectively.
>
That should be "<" for "bra" and ">" for "ket".  The symbols are used to
denote a pair of operators in quantum mechanics.  I think the notation was
introduced by Richard Feynman.
--
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