[texhax] Corners

[Uwe Lueck]

Michael Barr <mbarr at math.mcgill.ca> schrieb am 04.12.2006 16:27:04:
> 
> My journal is reprinting a forty year old paper that has a construction 
> that consists of a string (usually of one two characters) surrounded by 
> corners.  You get something like what I want from \ulcorner#1\urcorner 
> (these are from an AMS symbol font).  However that construction produces 
> ugly looking spaces between the corners and their argument.  I would like 
> to raise the corners, move them over, then add some extra space around the 
> whole construction.  One complication is that they will have to put in 
> boxes to raise them, which means that they won't know if they are in a 
> sub/superscript or not.  I could kludge something together using 
> \mathchoice, but it will ugly.  Is there a better way of doing this, or 
> has someone already done it?

No answer!? (Next time:) \mathchoice (\mathpalette!?) is good, 
together with \hspace (positive arg), \hspace* (negative arg), 
\raisebox from LaTeX. 

Uwe Lueck.