### Example Environment Usage

Source: https://github.com/elegantlatex/elegantbook/wiki/MathEnvironments

The example environment can be used directly without specific options. It is numbered within the chapter and may include a prompt.

```tex
\begin{example}
This is the content of example environment.
\end{example}
```

--------------------------------

### Basic Introduction Environment Usage

Source: https://github.com/elegantlatex/elegantbook/wiki/ChapterSummary

This snippet shows the fundamental usage of the \begin{introduction} environment to list chapter items. It requires no special setup beyond including the ElegantLaTeX package.

```latex
\begin{introduction}
  \item Definition of Theorem
  \item Ask for help
  \item Optimization Problem
  \item Property of Cauchy Series
  \item Angle of Corner
\end{introduction}
```

--------------------------------

### Update TeX Live Packages

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Use these commands to update the TeX Live manager itself and all installed packages.

```latex
tlmgr update --self
tlmgr update --all
```

--------------------------------

### Custom Chinese Fonts with nofont Option

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-cn.tex

Configure custom Chinese fonts using the nofont option. This example sets main, sans-serif, and monospace fonts, and defines custom commands for different styles.

```latex
\setCJKmainfont[BoldFont={FZHei-B01},ItalicFont={FZKai-Z03}]{FZShuSong-Z01}
\setCJKsansfont[BoldFont={FZHei-B01}]{FZKai-Z03}
\setCJKmonofont[BoldFont={FZHei-B01}]{FZFangSong-Z02}
\setCJKfamilyfont{zhsong}{FZShuSong-Z01}
\setCJKfamilyfont{zhhei}{FZHei-B01}
\setCJKfamilyfont{zhkai}[BoldFont={FZHei-B01}]{FZKai-Z03}
\setCJKfamilyfont{zhfs}[BoldFont={FZHei-B01}]{FZFangSong-Z02}
\newcommand*{\songti}{\CJKfamily{zhsong}}
\newcommand*{\heiti}{\CJKfamily{zhhei}}
\newcommand*{\kaishu}{\CJKfamily{zhkai}}
\newcommand*{\fangsong}{\CJKfamily{zhfs}}
```

--------------------------------

### Create Introduction Environment

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Use the \begin{introduction} environment to list items, such as definitions or topics. The title can be customized with an optional argument.

```latex
\begin{introduction}
  \item Definition of Theorem
  \item Ask for help
  \item Optimization Problem
  \item Property of Cauchy Series
  \item Angle of Corner
\end{introduction}
```

```latex
\begin{introduction}[Brief Introduction]
...\end{introduction}
```

--------------------------------

### Theorem Environment Usage (Fancy Mode)

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Demonstrates various ways to use the \begin{theorem} environment with and without names and labels in fancy mode.

```latex
% name + label
  \begin{theorem}{theorem name}{label}
    The content of a theorem with name and label. 
    Use \ref{thm:label} to refer this theorem.
  \end{theorem}
  % no name + label
  \begin{theorem}{}{label no name}
    The content of a theorem without name.
    Use \ref{thm:label no name} to refer this theorem.
  \end{theorem}
  % name + no label
  \begin{theorem}{theorem name}{}
    The content of a theorem without label.
    Can't refer this theorem.
    The last {} can be removed.
  \end{theorem}
  % no name + no label
  \begin{theorem}{}{}
    The content of a theorem without name and label.
    Can't refer this theorem.
    Both of {} can be removed.
  \end{theorem}
```

--------------------------------

### Customizing Introduction Environment Title

Source: https://github.com/elegantlatex/elegantbook/wiki/ChapterSummary

Demonstrates how to change the default title of the 'introduction' environment by providing an optional argument. This allows for more specific labeling of the content.

```latex
\begin{introduction}[Brief Introduction]
...
\end{introduction}
```

--------------------------------

### Theorem Environment Usage (Simple Mode)

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Illustrates the usage of theorem environments in simple mode, which relies on the amsthm package.

```latex
\begin{theorem}[theorem name]\label{thm:theorem-label}
  The content of theorem.
\end{theorem}
% or 
\begin{theorem}\label{thm:theorem-without-name}
  The content of theorem without name.
\end{theorem}
```

--------------------------------

### Defining a Theorem Environment

Source: https://github.com/elegantlatex/elegantbook/wiki/MathEnvironments

Use the \begin{theorem} command to create a theorem. Provide a name for the theorem and a label for cross-referencing. Cross-references must be prefixed with 'thm:'.

```tex
\begin{theorem}{theorem name}{label}
The content of theorem.
\end{theorem}
```

--------------------------------

### Theorem Environment Usage (Fancy Mode, v4.1+)

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Shows the updated syntax for theorem environments from version 4.1 onwards, using optional arguments for names and labels.

```latex
\begin{theorem}[theorem name]\label{thm:theorem-label}
  The content of theorem.
\end{theorem}
% or
\begin{theorem}\label{thm:theorem-without-name}
  The content of theorem.
\end{theorem}
```

--------------------------------

### Selecting Bibliography Backend (Biber/BibTeX)

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Shows how to select the bibliography backend using the 'bibtex' option or 'bibend=bibtex'. Biber is the recommended backend for this template.

```LaTeX
\documentclass[bibtex]{elegantbook} % or
\documentclass[bibend=bibtex]{elegantbook}
```

--------------------------------

### Basic ProblemSet Environment Usage

Source: https://github.com/elegantlatex/elegantbook/wiki/ProblemSet

Use the `problemset` environment to list exercises. Customize the title using an optional argument, similar to the `introduction` environment. Entries appear in the catalogue but not headers/footers.

```tex
\begin{problemset}
  \item exercise 1
  \item exercise 2
  \item exercise 3
\end{problemset}
```

--------------------------------

### Add Unnumbered Chapter with Preface

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Use \chapter*{...} to add a preface or unnumbered chapter. Ensure \markboth is used for correct header/footer pagination.

```latex
\chapter*{Introduction}
\markboth{Introduction}{Introduction}
The content of introduction.
```

--------------------------------

### Enable yhmath Package

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-cn.tex

Uncomment these lines in elegantbook.cls to load the yhmath package when using newtxmath, resolving potential symbol font conflicts.

```latex
%%% use yhmath pkg, uncomment following code
% \let\oldwidering\widering
% \let\widering\undefined
% \RequirePackage{yhmath}
% \let\widering\oldwidering
```

--------------------------------

### Selecting a Color Theme

Source: https://github.com/elegantlatex/elegantbook/wiki/ColorThemes

Choose a color theme by passing its name as an option to the \documentclass command. The default theme is blue.

```tex
\documentclass[green]{elegantbook} %or
\documentclass[color=green]{elegantbook}
```

--------------------------------

### Enable esvect Package

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-cn.tex

Uncomment these lines in elegantbook.cls to load the esvect package when using newtxmath, resolving potential symbol font conflicts.

```latex
%%% use esvect pkg, uncomment following code
% \RequirePackage{esvect}
```

--------------------------------

### Set Elegant Book Document Class Options

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Specify document class options for one or two-column layouts, and for including a table of contents.

```latex
\documentclass[twocol]{elegantbook}
```

```latex
\documentclass[toc=twocol]{elegantbook}
```

--------------------------------

### Customizing List Environments

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Demonstrates the customization of itemize and enumerate list environments to specific depths using TikZ. This is useful for creating deeply nested lists with consistent styling.

```LaTeX
\begin{minipage}[b]{0.49\textwidth}
- first item of nesti;

- second item of nesti;
 - first item of nestii;

- second item of nestii;
 - first item of nestiii;

- second item of nestiii.
\end{minipage}
\hfill
\begin{minipage}[b]{0.49\textwidth}
- first item of nesti;

- second item of nesti;
 - first item of nestii;

- second item of nestii;
 - first item of nestiii;

- second item of nestiii.
\end{minipage}
```

--------------------------------

### Add Figures to Margin Notes with Center Environment

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Alternatively, use the \begin{center} environment within \marginpar to center figures and their captions. This method also requires \captionof for the figure caption.

```latex
% graph with center environment
\marginpar{
  \begin{center}
    \includegraphics[width=0.2\textwidth]{logo.png}
    \captionof{figure}{your figure caption}
  \end{center}
}
```

--------------------------------

### Minimal ElegantBook Document Structure

Source: https://github.com/elegantlatex/elegantbook/wiki/MinimalExample

This snippet shows the essential preamble and document body for a minimal elegantbook. It includes metadata like title, author, and date, along with basic document content such as a title page, table of contents, and a sample chapter.

```tex
\documentclass{elegantbook}
% title info
\title{Title}
\subtitle{Subtitle is here}
% bio info
\author{Your Name}
\institute{XXX University}
\date{\today}
% extra info
\version{1.00}
\extrainfo{Victory won't come to us unless we go to it. --- M. Moore}
\logo{logo.png}
\cover{cover.jpg}

\begin{document}

\maketitle
\tableofcontents
\mainmatter
\hypersetup{pageanchor=true}
% add preface chapter here if needed
\chapter{Example Chapter Title}
The content of chapter one.

\bibliography{reference}
\end{document}
```

--------------------------------

### Define Custom Colors in ElegantBook Preamble

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Customize colors by setting 'nocolor' or 'color=none' and defining 'structurecolor', 'main', 'second', and 'third' colors using RGB values in the preamble.

```latex
\definecolor{structurecolor}{RGB}{60,113,183}
\definecolor{main}{RGB}{0,166,82}%
\definecolor{second}{RGB}{255,134,24}%
\definecolor{third}{RGB}{0,174,247}%
```

--------------------------------

### Setting Document Class to Simple Mode

Source: https://github.com/elegantlatex/elegantbook/wiki/MathEnvironments

Change the document to 'simple' mode by specifying it in the \documentclass command. This affects the styling of theorem environments.

```tex
\documentclass[simple]{elegantbook} %or
\documentclass[mode=simple]{elegantbook}
```

--------------------------------

### Add Bio Information to Cover

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Use the \bioinfo command to display custom user information on the cover page. It takes two arguments: the caption and the content.

```latex
\bioinfo{Username}{115520}
```

--------------------------------

### Customizing Colors

Source: https://github.com/elegantlatex/elegantbook/wiki/ColorThemes

To customize colors, set the 'nocolor' option or 'color=none' and then define the structurecolor, main, second, and third colors using \definecolor in the preamble.

```tex
\definecolor{structurecolor}{RGB}{60,113,183}
\definecolor{main}{RGB}{0,166,82}%
\definecolor{second}{RGB}{255,134,24}%
\definecolor{third}{RGB}{0,174,247}% 
```

--------------------------------

### Add Preface to Elegant Book

Source: https://github.com/elegantlatex/elegantbook/wiki/Preface

Use this LaTeX code to add a preface before the first chapter. It ensures the preface is listed in the table of contents and has its own header, while chapter numbering remains unaffected.

```tex
\chapter*{Preface}
\addcontentsline{toc}{chapter}{Preface}
\markboth{Preface}{}
The content of Preface.
```

--------------------------------

### Placing Equations in Margin Notes

Source: https://github.com/elegantlatex/elegantbook/wiki/SideNote

Equations can be placed within `\marginpar` by enclosing them in a LaTeX math environment. Ensure the environment is compatible with margin placement.

```tex
% equation
\marginpar{
  \begin{equation}
    a^2 + b^2 = c^2
  \end{equation}
}
```

--------------------------------

### Setting Theorem Counter Display Style

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Configures the theorem counter display style using the 'thmcnt' option in the document class.

```latex
\documentclass[section]{elegantbook} % turn the Theorem 4.1 to Theorem 4.1.1 
\documentclass[thmcnt=section]{elegantbook}
```

--------------------------------

### Placing Text in Margin Notes

Source: https://github.com/elegantlatex/elegantbook/wiki/SideNote

Use the `\marginpar` command to insert text directly into the margin. This is suitable for short annotations or comments.

```tex
% text
\marginpar{margin paragraph text}
```

--------------------------------

### Changing Bibliography Styles

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Demonstrates how to change the citation and bibliography styles using the 'citestyle' and 'bibstyle' options. Refer to the biblatex CTAN page for available styles.

```LaTeX
\documentclass[citestyle=numeric-comp, bibstyle=authoryear]{elegantbook}
```

--------------------------------

### Activate iPad Mode in ElegantBook

Source: https://github.com/elegantlatex/elegantbook/wiki/DeviceModeOption

Use the 'pad' option directly or specify 'device=pad' when loading the elegantbook document class to activate iPad mode.

```tex
\documentclass[pad]{elegantbook} %or
\documentclass[device=pad]{elegantbook}
```

--------------------------------

### Uncommenting yhmath Package Loading

Source: https://github.com/elegantlatex/elegantbook/wiki/SymbolFont

Uncomment this code block in `elegantbook.cls` to enable the `yhmath` package and resolve symbol font conflicts.

```tex
% \let\oldwidering\widering
% \let\widering\undefined
% \RequirePackage{yhmath}
% \let\widering\oldwidering
```

--------------------------------

### Set Math Font to newtx

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-cn.tex

Use this option to select the newtxmath package for mathematical fonts. This was the default in older versions.

```latex
\documentclass[math=newtx]{elegantbook}
```

--------------------------------

### Handling Hyphens with Newtx Math Font

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Illustrates a specific hyphenation and math rendering issue when using the 'newtx' math font option. Pay attention to the rendering of '_R^q f(x,y) dy.*of0pt f* x'.

```LaTeX
\begin{equation}
  \int_{R^q} f(x,y) dy.\emph{of \kern0pt f} \sin x
\end{equation}
```

--------------------------------

### Set Document Language in ElegantBook

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Use the \documentclass command with the 'lang' option to specify the document's language. The default is 'en'.

```latex
\documentclass[en]{elegantbook}
```

```latex
\documentclass[lang=en]{elegantbook}
```

--------------------------------

### Uncommenting esvect Package Loading

Source: https://github.com/elegantlatex/elegantbook/wiki/SymbolFont

Uncomment this code block in `elegantbook.cls` to enable the `esvect` package and resolve symbol font conflicts.

```tex
% \RequirePackage{esvect}
```

--------------------------------

### Hiding the Base with Document Class Options

Source: https://github.com/elegantlatex/elegantbook/wiki/BaseHideOption

Use the `hide` or `base=hide` option in the \documentclass command to hide the end-of-chapter or below-of-page base. This is an optional setting.

```tex
\documentclass[hide]{elegantbook} %or
\documentclass[base=hide]{elegantbook}
```

--------------------------------

### Fix newtxmath Hyphenation Issue

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-cn.tex

This code snippet demonstrates the correct way to typeset a formula with newtxmath to avoid hyphenation issues with the underscore.

```latex
\begin{equation}
  \int_{R^q} f(x,y) dy.\emph{of\kern0pt f} \sin x
\end{equation}
```

--------------------------------

### Include Non-Cited References in Bibliography

Source: https://github.com/elegantlatex/elegantbook/wiki/Bibliography

Use the \nocite command to include specific or all bibitems in the generated bibliography. This is useful for adding references that are not directly cited in the text.

```tex
\nocite{EINAV2010,Havrylchyk2018} %or include some bibitems
\nocite{*} %include all the bibitems
```

--------------------------------

### Printing the Bibliography

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Includes commands to print the bibliography within the document, with options for including it in the table of contents and setting a custom title. The default title is '\ebibname'.

```LaTeX
\printbibliography[heading=bibintoc, title=\ebibname]
```

--------------------------------

### Handling Mathematical Expressions with Hyphens

Source: https://github.com/elegantlatex/elegantbook/wiki/Hyphen

This snippet demonstrates how to correctly format a mathematical expression within an equation environment to avoid hyphenation issues when using the newtx font family. It ensures proper rendering of the expression 'of f'.

```tex
\begin{equation}
  \int_{R^q} f(x,y) dy.\emph{of \kern0pt f}
\end{equation}
```

--------------------------------

### Adding Local Bibliography Resource

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Adds a local 'reference.bib' file to the document's bibliography resources. This is required for biblatex to find and process your bibliography entries.

```LaTeX
\addbibresource[location=local]{reference.bib}
```

--------------------------------

### Including Centered Graphs in Margin Notes

Source: https://github.com/elegantlatex/elegantbook/wiki/SideNote

To include images in margin notes, use `\marginpar` with either the `\centerline` command or the `center` environment for horizontal centering. The `\captionof` command is used to add a caption to the figure.

```tex
% graph with centerline command
\marginpar{
  \centerline{
    \includegraphics[width=0.2\textwidth]{logo.png}
  }
  \captionof{figure}{your figure caption}
}
```

```tex
% graph with center environment
\marginpar{
  \begin{center}
    \includegraphics[width=0.2\textwidth]{logo.png}
    \captionof{figure}{your figure caption}
  \end{center}
}
```

--------------------------------

### Set Chapter Title Display Style

Source: https://github.com/elegantlatex/elegantbook/wiki/DisplayStyles

Use the 'hang' option for single-line chapter headings or 'titlestyle=hang' for the default behavior. To change to a double-line style, use 'display' instead.

```tex
\documentclass[hang]{elegantbook} %or
\documentclass[titlestyle=hang]{elegantbook}
```

--------------------------------

### Define Custom Cover Line Color

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Customize the color of the horizontal bar on the cover page by defining a custom RGB color and then using \colorlet to assign it to coverlinecolor.

```latex
\definecolor{customcolor}{RGB}{32,178,170}
  \colorlet{coverlinecolor}{customcolor}
```

--------------------------------

### Add Figures to Margin Notes with Centerline

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Include figures in margin notes using \marginpar. The \centerline command can be used to center the image within the margin. Ensure \captionof is used for the figure caption.

```latex
% graph with centerline command
\marginpar{
  \centerline{
    \includegraphics[width=0.2\textwidth]{logo.png}
  }
  \captionof{figure}{your figure caption}
}
```

--------------------------------

### Set Citation Style to Superscript

Source: https://github.com/elegantlatex/elegantbook/wiki/Bibliography

Configure the ElegantBook document class to use the 'super' citation style for numerical references. This is often preferred in science and technology fields.

```tex
\documentclass[cite=super]{elegantbook}
\documentclass[super]{elegantbook}
```

--------------------------------

### Set Document Language to Chinese

Source: https://github.com/elegantlatex/elegantbook/wiki/Languages

Use the `lang=cn` option to set the document language to Chinese. This affects captions and other localized text. The default is `lang=en`.

```tex
\documentclass[lang=cn]{elegantbook}
```

```tex
\documentclass[lang=en]{elegantbook}
```

--------------------------------

### Resolving Symbol Font Declaration Errors

Source: https://github.com/elegantlatex/elegantbook/blob/master/elegantbook-en.tex

Provides commented-out code to uncomment if you encounter 'Too many symbol fonts declared' errors when using packages like 'yhmath' or 'esvect'. This involves redefining font handling in the class file.

```LaTeX
%%% use yhmath pkg, uncomment following code
% \let\oldwidering\widering
% \let\widering\undefined
% \RequirePackage{yhmath}
% \let\widering\oldwidering

%%% use esvect pkg, uncomment following code
% \RequirePackage{esvect}
```

--------------------------------

### Set Citation Style to Author-Year

Source: https://github.com/elegantlatex/elegantbook/wiki/Bibliography

Configure the ElegantBook document class to use the 'authoryear' citation style. This is commonly used in the liberal arts and humanities.

```tex
\documentclass[cite=authoryear]{elegantbook} % set cite for author year ref style
\documentclass[authoryear]{elegantbook}
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.