Front Matter
Skip to main content\(\def\Z{\mathbb{Z}}
\def\zn{\mathbb{Z}_n}
\def\znc{\mathbb{Z}_n^\times}
\def\R{\mathbb{R}}
\def\Q{\mathbb{Q}}
\def\C{\mathbb{C}}
\def\N{\mathbb{N}}
\def\M{\mathbb{M}}
\def\G{\mathcal{G}}
\def\0{\mathbf 0}
\def\Gdot{\langle G, \cdot\,\rangle}
\def\phibar{\overline{\phi}}
\DeclareMathOperator{\lcm}{lcm}
\DeclareMathOperator{\Ker}{Ker}
\def\siml{\sim_L}
\def\simr{\sim_R}
\newcommand{\lt}{<}
\newcommand{\gt}{>}
\newcommand{\amp}{&}
\)