[OS X TeX] Left Justified Symbol

Martin Costabel costabel at wanadoo.fr
Mon Apr 27 23:20:47 CEST 2009

Rose Charlie wrote:
> Very slick, and it does *almost* exactly what I need ... what's lacking 
> is that it's not in the "equation" environment so no equation number is 
> generated. And, being the LaTeX amateur that I am, I don't know how to 
> produce that myself. I *will* try to figure it out, though.

If your equation is not numbered, you can simply use \leqno:

    your equation

For numbered equations, the following does the trick

      \rlap{\hskip -\displaywidth\ $\blacktriangleright$}}}

   your equation

Just use the command \triangleeq inside the equation environment where 
you want the triangle. The triangle will be placed at the beginning of 
the line that has the equation number.


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