changed notation to lambda_EP not lambda_c

Manuscript/EPAWTFT.tex

@@ -1378,7 +1378,7 @@ set representations of the MP critical point.\cite{Sergeev_2006}
     The UMP ground-state EP becomes a critical point in the strong correlation limit (large $U/t$).
     (\subref{subfig:ump_cp}) As the $U/t$ increases, the avoided crossing on the real $\lambda$ axis
     becomes increasingly sharp.
-    (\subref{subfig:ump_ep_to_cp}) The convergence of the EPs onto the real axis for $U/t \rightarrow \infty$
+    (\subref{subfig:ump_ep_to_cp}) The convergence of the EPs at $\lep$ onto the real axis for $U/t \rightarrow \infty$
     mirrors the formation of the RMP critical point and other QPTs in the infinite basis set limit.
 }
 \label{fig:UMP_cp}}