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Re: Implied brackets, are they really there?
Posted:
Feb 17, 1999 2:56 PM


In article <36cd05bf.275180203@news.newsguy.com>, Quentin Grady <quentin@inhb.co.nz> wrote:
>When explaining how to simplify the expression > > 15 + 6 > > 3 + 4 (snip) >(I made the mistake of asking what the  line was called and >never got an answer.)
The  line is called a vinculum.
In old, usually elementary, books it was occasionally used in places other than fractions: ___ x  yz = x  y + z for example. Nowadays it is uaually avoided in such contexts because it might make one think of mean values or complex conjugates.
>Apart from downing a few cold beers on Friday night has anyone any >helpful suggestions for resolving the dilemma.
 in the context of mean values or complex conjugates is usually called a bar. It doesn't have cold beers behind it though. (English as well as mathematics often uses one symbol for more than one purpose.)
John Harper, School of Mathematical and Computing Sciences, Victoria University, Wellington, New Zealand email john.harper@vuw.ac.nz phone (+64)(4)463 5341 fax (+64)(4)463 5045



