How can I create my own scalable math operator with limits just like the sum symbol? Specifically I want to invent a "concatenation" symbol that looks alike to: "[". For example I want to put
[ _{i=1}^N
etc. where the subscript/superscripts are positioned below and above the symbol as in "eqnarray" environment.
I have tried with \newcommand
and creating a drawing similar to "[" with \begin{picture} \end{picture}
, but it didn't work.
Thanks for the help!
$\mathop{\Big[}\limits_{i=1}^N$
?