RE: [Groff] Surface Integral in eqn

[Ted Harding]

On 11-Aug-05 Frank Jahnke wrote:
> Although I'm pretty proficient at eqn, I've never figured out how one
> makes the symbol for a surface integral.  This looks like a regular
> integral, but it has an open circle in the middle of it.  How might I
> do
> so?  Thanks in advance!
> 
> Frank

This is a quick reply -- there's a better approach (using the
'special' command in eqn) but it would take me a little longer
to work out details.

Try the following, or some variant of it:

.EQ
sdefine Sint %{type "operator" vcenter \
size +10 {"\Z'\h'0.04n'\v'-0.8n'\D'c 0.5n''\[is]"}}%
.EN

or put the material between ".EQ" and ".EN" in your .../tmac/eqnrc
file.

Example (with the above already defined):

.EQ I
Sint sub S f(x) ~ dS
.EN

Hoping this helps,
Best wishes,
Ted.


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Date: 17-Aug-05                                       Time: 14:53:08
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