[texhax] Amstex problem: sideset or operatorname

[Zbigniew Nitecki]

I am trying to use the \sideset option to create a macro which prints  
one argument (say v) inside brackets, with a "subscript", on the left  
of the left bracket.  The code for the macro is
************************************************************************ 
**********
\newcommand{\matrepvec}[2]{\ensuremath{\sideset{_{#1}}{}{\operatorname 
{\lbrack #2\rbrack}}}}
************************************************************************ 
*************

It gives me the effect I want, but has curious behavior with respect  
to variable #2:  when I
invoke

$\matrepvec{B}{\vec{v}}$

I get not v surmounted by an arrow, but v tilde (or something like  
it) inside the brackets.  What is causing this?

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

telephones:
Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://tug.org/pipermail/texhax/attachments/20070701/57bfdd32/attachment.html