\newcommand{\pcy}{\pay{C}}
\newcommand{\pcn}{\pan{C}}
+\newcommand{\pd}{\pa{D}}
+\newcommand{\pdy}{\pay{D}}
+\newcommand{\pdn}{\pan{D}}
+
\newcommand{\pl}{\pa{L}}
\newcommand{\ply}{\pay{L}}
\newcommand{\pln}{\pan{L}}
\newcommand{\allpatches}{\Upsilon}
\newcommand{\assign}{\leftarrow}
+\newcommand{\iassign}{\leftarrow}
%\newcommand{\assign}{' =}
+\newcommand{\alg}[1]{\text{\bf #1}}
+\newcommand{\setmerge}{\alg{merge}}
+\newcommand{\setmergeof}[3]{\setmerge\left\langle #1 \;\middle\langle #2 \middle\rangle\; #3 \right\rangle}
+%\newcommand{\setmergeof}[3]{\setmerge\left\lgroup #1 \;\middle\lmoustache\; #2 \;\middle\rmoustache\; #3 \right\rgroup}
+%\newcommand{\setmergeof}[3]{\setmerge\left\rmoustache #1 \middle\rmoustache #2 \middle\lmoustache #3 \right\lmoustache}
+%\newcommand{\setmergeof}[3]{\setmerge\left\lfloor #1 \middle\lfloor #2 \middle\rfloor #3 \right\rfloor}
+
\newcommand{\eqntag}[2]{ #2 \tag*{\mbox{#1}} }
\newcommand{\eqn}[2]{ #2 \tag*{\mbox{\bf #1}} }