+% We have to redefine \big and friends as we are using 12pt symbols
+\def\big#1{{\hbox{$\left#1\vbox to11.5\p@{}\right.\n@space$}}}
+\def\Big#1{{\hbox{$\left#1\vbox to14.5\p@{}\right.\n@space$}}}
+\def\bigg#1{{\hbox{$\left#1\vbox to17.5\p@{}\right.\n@space$}}}
+\def\Bigg#1{{\hbox{$\left#1\vbox to20.5\p@{}\right.\n@space$}}}
+