56 lines
1.2 KiB
TeX
56 lines
1.2 KiB
TeX
\documentclass{report}
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\usepackage{amssymb, amsmath, hyperref}
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\usepackage{preamble}
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\theoremstyle{plain}
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\newtheorem{theorem}[subsection]{Theorem}
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\newtheorem{proposition}[subsection]{Proposition}
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\newtheorem{lemma}[subsection]{Lemma}
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\theoremstyle{definition}
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\newtheorem{definition}[subsection]{Definition}
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\newtheorem{example}[subsection]{Example}
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\newtheorem{exercise}[subsection]{Exercise}
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\newtheorem{situation}[subsection]{Situation}
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\theoremstyle{remark}
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\newtheorem{remark}[subsection]{Remark}
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\newtheorem{remarks}[subsection]{Remarks}
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\numberwithin{equation}{subsection}
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\newcommand{\hi}{gamer}
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\begin{document}
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\chapter{A first chapter}
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\label{chapter:first}
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\section{A first section}
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\label{section:first}
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\begin{lemma}
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\label{lemma:pythagoras}
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$a^2=b^2+c^2$
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\hi
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\end{lemma}
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\begin{proof}
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greetings fellow gamer
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\[\xymatrix{ & Y_1 & \\ X \ar[ru]^{f_1} \ar[r]^{f_3} \ar[rd]_{f_2} & Y_3 \ar[u]_{a_{31}} \ar[d]^{a_{32}} & Y \ar[lu]_{s_1} \ar[l]_{s_3} \ar[ld]^{s_2} \\ & Y_2 & }\]
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\end{proof}
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\section{A second section}
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\label{section:second}
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\chapter{A second chapter}
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\label{chapter:second}
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\section{A third section}
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\label{section:third}
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\section{A fourth section}
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\label{section:fourth}
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\end{document}
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