ranjitjhala

\newcommand{\rnk}{\rho}
\newcommand{\rr}{\mathcal{R}}
\newcommand{\rord}{\mathcal{O}}
\newcommand{\runi}{{\mathcal{U}}}
\newcommand{\rapp}{{\mathcal{A}}}
\newcommand{\rcon}{{\mathcal{C}}}
\newcommand{\rgc}{{\mathcal{G}}}
\newcommand{\rfail}{{\mathcal{F}}}
\newcommand{\rspc}{{\mathcal{S}}}