# Help on LaTeX

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1. Sep 4, 2013

### annoymage

Firstly, where do I have to post if i have a question on LaTeX?

and here's the question,

$\vdash_{A}$

how do I make that subscript exactly below the line - on that simbol?

2. Sep 4, 2013

### jhae2.718

Code (Text):
\mathop{\vdash}_{A}
will produce $\mathop{\vdash}_{A}$. You could also use \stackrel and play with sizing and spacing.