# Removing dot after section letter

Right now this I'm getting this for my first subsubsection:

G.1.1.

I would like for this to be

G1.1.

Does anybody know if it is possible to remove the first dot and put G and 1 together without a space between? Code below:

\documentclass{article}

\begin{document}

\renewcommand{\thesection}{\Alph{section}}
\setcounter{section}{7}
\setcounter{subsection}{1}
\subsubsection{Hello World} % G.1.1 I want it to be G1.1

\end{document}

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Welcome to TeX.sx! I took the liberty to reduce your code to a minimal working example (MWE). Please always do that before posting a question here; a MWE is our standard format and requirement, which makes it easier for others to identify your problem and help you with it. It actually turned out that none of your -- admittedly nicely organized -- preamble was relevant to the problem. You did forget \end{document} though. And I'd recommend using braces {} for \renewcommand. –  doncherry Sep 21 '12 at 4:24
You have to redefine \thesubsection, i.e.,
\renewcommand{\thesubsection}{\thesection\arabic{subsection}}
