RE: [Groff] Ellipsis and Cdots

[Ted Harding]

PS: One thing I forgot to mention (below) is that the token ",...,"
(i.e. comma and 3 dots and comma with no spaces) will place the three
dots on the baseline, in line with the commas, as in

  for $r ^=^ 1 , 2 ,..., N$

However, this then devolves the entire layout of the sequence to eqn.
In practice, I prefer to retain control over the layout as in (for
example):

  for $r ^=^ 1 , 2^ ,^^ldots^^, N$

Ted.

On 17-Dec-10 09:18:12, Ted Harding wrote:
> On 17-Dec-10 08:28:11, Cedric Sodhi wrote:
>> Hello,
>> according to man eqn an ellipsis of three subsequent dots will be
>> replaced by a real ellipsis, whereas to get three centered dots one
>> should use cdots.
>> However when I enter ... I get cdots and I wouldn't know how to get a
>> real ellipsis, since there does not appear to be an ellipsis glyph in
>> groff_char either (typing "..." will insert three mal-aligned dots).
>> 
>> Can anyone shed light on this? Thanks
> 
> In eqn, to get 3 dots on the baseline, use 'ldots', as in a context
> like
> 
>   for $r ^=^ 1 , 2 , ldots , N$
> 
> As you say, "..." produces centred dots in eqn. Groff's eqn (1.18.1)
> does
> not recognise the token 'cdots', and 'man eqn' does not mention it. You
> may have been reading the man-page for eqn in some other version of
> UNIX.
> 
> There is an entry for ellipsis in the Symbol font, where it has octal
> code 0274 = decimal 188 (but no name), so \f[S]\N'188'\fP will give you
> an ellipsis, and you can define your own name for it like
> 
> .char \[el] \f[S]\N'188'\fP
> 
> so that (in ordinary text, i.e. outside eqn) you can write something
> like
> 
>   In the International Phonetic Alphabet
>   A is Alpha, B is Bravo, C is Charlie, \[el] , Z is Zulu
> 
> (Or you could call it \[...] if you prefer ... )!
> 
> Hoping this helps,
> Ted.
> 
> --------------------------------------------------------------------
> E-Mail: (Ted Harding) <address@hidden>
> Fax-to-email: +44 (0)870 094 0861
> Date: 17-Dec-10                                       Time: 09:18:09
> ------------------------------ XFMail ------------------------------
> 

--------------------------------------------------------------------
E-Mail: (Ted Harding) <address@hidden>
Fax-to-email: +44 (0)870 094 0861
Date: 17-Dec-10                                       Time: 11:14:47
------------------------------ XFMail ------------------------------