Added lautern citation

latex/presentations/midterm/sections/forthcoming_examination.tex

@@ -13,6 +13,8 @@
         \item Test the (Alternating Direction Method of Multipliers) ADMM
               as an optimization method for LP Decoding
             \begin{itemize}
+                \item In LP decoding, the ML decoding problem is reduced to a linear program,
+                    which can be solved in polynomial time \cite{lautern}
                 \item ADMM is intended to blend the decomposability
                     of dual ascent with the superior convergence properties of the method
                     of multipliers \cite{distr_opt_book}