Minor fix

src/main.tex

@@ -34,7 +34,7 @@
 %------------------------------------------------------------------------------------------
 %  !  !  !  !  !  !  !  !  !  !  !  ! user defined variables  !  !  !  !  !  !  !  !  !  !  !  !  !  !
 % Please use these commands to define title and author(s) of the paper:
-\def\papertitle{$\lambda_{mmm}$: the Intermediate Representation for Synchronous Signal Processing Language Based on Lambda Calculus}
+\def\papertitle{Lambda-mmm: the Intermediate Representation for Synchronous Signal Processing Language Based on Lambda Calculus}
 \def\paperauthorA{Tomoya Matsuura}
 
 % we should not have page number