This is ChlorophyII's LaTeX package.

It takes five minutes to set up and another five minutes to know the way to use it. Hope it can save you a lot more time.

\usepackage{ChlorophyII}

Highlights

1. Zenburn mode: Add \zenburn somewhere before \begin{document}. Compile. Protect your eyes.

2. Auto-brackets: Try \abrr{\abrr{\abrr{1+1}^{p+1}}+\frac{/pi^2}{6}}. The round brackets will automatically increase their size depending on contents.
   However, \abrr{\abrr{1+1}+1} does not look good, for the outer ones are as small as the inner ones. In this case, use \abrr[big]{\abrr{1+1}+1} instead. big can be replaced by normal, Big, bigg and Bigg.
   \abrs, \abrc and \abra work exactly the same way as \abrr, except that they give (), {} and <> respectively.

3. Finite-series: \series generates the expanded form of the finite sum of a series from its expression of the nth-term. It liberates you from repeatedly typing awkward LaTeX expressions. Look!

   

   Instead of \frac{1^{-p}}{2^{-1}}+\frac{2^{-p}}{2^{-2}}+\cdots+\frac{j^{-p}}{2^{-j}}, you just need \series[j]{\frac{\n^{-p}}{2^{-\n}}}. Fewer characters are good, but the real power of \series unfolds when you want to change the term a little bit. Say, if you want to associate p with an index, you can simply replace p by p_\n. See examples for more information.

Installation

macOS

If you don't have git, run the following in Terminal.app.

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew install git

After you have installed git, copy, past and run:

cd ~/Library
mkdir -p texmf/tex/latex
cd texmf/tex/latex
git clone https://github.com/ChlorophyII/LaTeX-ChlorophyII.git
cd ../..
texhash

Other systems

Look at this question on TeX exchange.

Examples

1. \NN, \ZZ, \QQ, \RR, \CC

   

2. \Re{z}, \Im{z}

   

3. \abs{x-y},\norm{f-g}

   

4. apmatrix and abmatrix are augmented pmatrix and bmatrix. The arguments are the number of columns before and after the vertical bar.

   DF=
   \begin{apmatrix}{3}{3}
     \dfrac{\partial F_1}{\partial x_1} & \cdots & \dfrac{\partial F_1}{\partial x_n} & \dfrac{\partial F_1}{\partial y_1} & \cdots & \dfrac{\partial F_1}{\partial y_m}\\
     \vdots & \ddots & \vdots\ & \vdots & \ddots & \vdots\\
     \dfrac{\partial F_m}{\partial x_1} & \cdots & \dfrac{\partial F_m}{\partial x_n} & \dfrac{\partial F_m}{\partial y_1} & \cdots & \dfrac{\partial F_m}{\partial x_n}
   \end{apmatrix}
   =
   \begin{apmatrix}{1}{1}
     D_{\mathbf{x}}F&D_{\mathbf{y}}F
   \end{apmatrix}

   

5. Auto-brackets:
   It is convenient to use \abrr, \abrs, \abrc and \abra in a lot of situations. It has three major benifits:

   • It helps you easily adjust the size of brackets, for your don't need to repeatedly typing \bigl, \Bigr...
   • It gives your code better structure. For example, if you do (x+1)^2, TeX will think the square is associated to ) rather than (x+1). \abrr{x+1}^2 avoids this issue and is better semantically.
   • It eliminates the possibility of a dangling left bracket or a right bracket. LaTeX will not think there is an error if you write (3+((x+1)+(x+2))^2. However, \abrr{3+\abrr{\abrr{x+1}+\abrr{x+2}}^2 does not compile and it forces you to check your code.

   \abrr{\abrr{\abrr{1+1}^{p+1}}+\frac{\pi^2}{6}}

   

   \abrr{\abrr{1+1}+1} produces bad typesetting

   

   \abrr can take one argument like \abrr[big]{\abrr{1+1}+1}

   

   big can be replaced by normal, Big, bigg or Bigg.
   \abrs, \abrc and \abra work exactly the same way as \abrr, except that they give (), {} and <> respectively. ("r": round, "s": square, "c": curly, "a": angle) \abrc[Big]{a\in\RR:\abrs{\sin\abrr[normal]{x+x^2}}_0^a\ge0}

   

6. Finite-series:
   It takes three optional and one required arguments. The syntax is
   \series[index][starting index][delimiter]{general term}.
   By default, index is n, starting index is 1, and delimiter is +. Optional arguments must be input in order. If you want to change the delimiter, you must type in index and starting index. starting index can be either 1 or 0. In general term, \n is used as a placeholder for the index.
   \series{a_\n}

   

   \series[j]{\frac{\n^{-p}}{2^{-\n}}}

   

   \series[m][0]{x_\n}

   

   a=\series[k][0][<]{c_\n}=b

   

   \series[n][1][,]{\n}

   

7. Theorems, definitions and remarks: This section is not loaded by default. To use it, use \usepackage[theorem]{ChlorophyII} in the preamble.

   definition, lemma, proposition, theorem, corollary, conjecture, example, remark, note and fact are environments, and they are used in the same way. You may or may not give a name to the theorem or definition or...

   \begin{theorem}[Fermat's Last Theorem]
   No three positive integers $a$, $b$, and $c$ satisfy the equation $a^n+b^n=c^n$ for any integer value of $n$ greater than $2$.
   \end{theorem}