In article <email@example.com>, Quentin Grady <firstname.lastname@example.org> 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 - y-z = 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 e-mail email@example.com phone (+64)(4)463 5341 fax (+64)(4)463 5045