$
\newcommand{\e}{e}
\newcommand{\N}[1][]{\mathbb{N}^{#1}}
\newcommand{\Q}[1][]{\mathbb{Q}^{#1}}
\newcommand{\R}[1][]{\mathbb{R}^{#1}}
\newcommand{\Z}[1][]{\mathbb{Z}^{#1}}
\newcommand{\C}[1][]{\mathbb{C}^{#1}}
\newcommand{\dx}{\,\mathrm{d}x}
\newcommand{\dy}{\,\mathrm{d}y}
\newcommand{\dz}{\,\mathrm{d}z}
\newcommand{\dt}{\,\mathrm{d}t}
\newcommand{\divides}{\, | \,}
\newcommand{\st}{\; | \;}
\renewcommand{\geq}{\geqslant}
\renewcommand{\leq}{\leqslant}
\renewcommand{\i}{\mathrm{i}}
\newcommand{\rank}{\mathop{\mathrm{rank}}}
\newcommand{\gcd}{\mathop{\mathrm{gcd}}}
\newcommand{\lcm}{\mathop{\mathrm{lcm}}}
\newcommand{\tr}{\mathop{\mathrm{tr}}}
\newcommand{\charField}{\mathop{\mathrm{char}}}
\newcommand{\Image}{\mathop{\mathrm{Im}}}
$
<- MAIN