main.tex

\documentclass[10pt, twocolumn]{article}
\usepackage{geometry}
\geometry{
  left=10mm,
  right=10mm,
  top=15mm,
  bottom=15mm
}

\usepackage{dsfont}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{enumerate}
\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{parskip} %% ziadne odstupy
\usepackage{hyperref}

\allowdisplaybreaks

\usepackage[compact]{titlesec} %% custom headings, compact style

%\titleformat{<command>}[<shape>]{<format>}{<label>}{<sep>}{<before-code>}[<after-code>]
%\titlespacing{<command>}{<left>}{<before-sep>}{<after-sep>}
\titleformat{\section}{\normalfont\large\bfseries\uppercase}{$\bigstar$~}{0pt}{}
\titleformat{\subsection}{\normalfont\large\bfseries}{$\clubsuit$~}{0pt}{}

 
\title{Cheatsheet for Kombat(1), part 2 and 3}
\author{Askar~Gafurov}

%% macros {{{
\def\seq#1{\left\lbrace#1\right\rbrace}
\def\nseq#1{\seq{#1}_{n\geq 0}}
\def\defarrow{\overset{\text{def}}{\Longleftrightarrow}}
\def\ogf{\overset{ogf}{\longleftrightarrow}}
\def\nthroot#1#2{\sqrt[\leftroot{2}\uproot{2}\scriptstyle {#1}]{#2}}
%% }}}

\begin{document}

\input{gen_func.tex}
\input{asymptotics.tex}

\hrulefill

source: \url{https://github.com/japdlsd/kombat1_cheatsheet}

\end{document}