[Tex/LaTex] Breaking equations within the align environment

alignamsmath

I currently have these two equations, but they are too long to fit on one line:

\begin{align*}
            [((a_0, a_1, a_2)+(b_0, b_1, b_2)) + (c_0, c_1, c_2)] &= 
            [((a_0 + b_0, a_1 + b_1, a_2 + b_2)) + (c_0, c_1, c_2)] \\
            &= (a_0 + b_0 + c_0, a_1 + b_1 + c_1, a_2 + b_2 + c_2) \\ 
\end{align*}

I want to achieve something to this effect:

I have tried using the split environment within the align environment, but that doesn't allow me to align the line breaks, while also keeping the equal signs independently aligned. I am also open to alternative ideas on how to make this look better. (I do not think the second equality looks great in my mockup.)

Best Answer

Two more alternatives:

\documentclass[border=3mm,preview]{standalone}
\usepackage{mathtools}

    \begin{document}
    The first option:
\begin{align*}
[((a_0, a_1, a_2) + & (b_0, b_1, b_2)) + (c_0, c_1, c_2)]         \\
    & = [((a_0 + b_0, a_1 + b_1, a_2 + b_2)) + (c_0, c_1, c_2)] \\
    & = (  a_0 + b_0 + c_0, a_1 + b_1 + c_1, a_2 + b_2 + c_2)  
\end{align*}
The second one:
\begin{align*}
[((a_0, a_1, a_2) + (b_0, b_1, b_2)) + (c_0, c_1, c_2)]     
    & = \begin{multlined}[t]
            [((a_0 + b_0, a_1 + b_1, a_2 + b_2))\\
                 + (c_0, c_1, c_2)] 
        \end{multlined}\\
    & = \begin{multlined}[t]
            (  a_0 + b_0 + c_0, a_1 + b_1 + c_1, \\
                    a_2 + b_2 + c_2)
        \end{multlined}
\end{align*}
    \end{document}

They gives:

Related Solutions

[Tex/LaTex] Aligning sub-equations within align

Use the \bigg variety for bigger delimiters and align the sums. There's a subtlety for the last one, since the long subscript would shift it to the right and \mathclap from mathtools avoids it.

\documentclass{article}

\usepackage{amsmath,amssymb,mathtools}
\DeclareMathOperator*{\argmax}{argmax}
\begin{document}
\begin{equation}\label{eq:BILP}
\begin{split}
I^* = \argmax_{\mathcal{I}}\biggl\{
  & \sum_{i\in \mathcal{V}} (\theta_K \cdot \mathbb{I}_{i,j}(1,1) + \theta_K \cdot \mathbb{I}_{i,j}(0,0) ) + {}\\
  & \sum_{i\in \mathcal{E}} \theta_{i_0} \cdot \mathbb{I}(x_i=0) + \theta_{i_1} \cdot \mathbb{I}(x_i=1) \biggr\}\\
\text{s.t.}\quad
  & \sum_{x_j} \mathbb{I}_{i,j}(1,x_j)  = \mathbb{I}(x_i=1) \\
  & \sum_{x_i}\mathbb{I}_{i,j}(x_i,1) = \mathbb{I}(x_j=1) \\
  & \sum_{\mathclap{x_i,x_j}}\mathbb{I}_{i,j}(x_i,x_j) = 1 
\end{split}
\end{equation}
\end{document}

enter image description here

[Tex/LaTex] Problems with alignment of sequences

Your alignment is perhaps better obtained using a structure like array:

enter image description here

\documentclass{article}
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\begin{document}
\begin{align*}
  &a_1,\ &b_1,\ &c_1,\ &d_1,\ &e_1\ \text{etc.}\\
  &a_2,\ &b_2,\ &c_2,\ &d_2,\ &e_2\ \text{etc.}
\end{align*}

\[
  \begin{array}{*{6}{l@{\ }}}
    a_1, & b_1, & c_1, & d_1, & e_1 & \text{etc.} \\[\jot]
    a_2, & b_2, & c_2, & d_2, & e_2 & \text{etc.}
  \end{array}
\]
\end{document}

The array consists of 6 l@{\ } columns - left-aligned, followed by a control-space \. \\[\jot] ensures a sizeable gap between the series, similar to that of align, while \text (provided by amsmath) does some testing to maintain the font size and is therefore superior to an \mbox construct (in general). In this case, it doesn't matter though.

Best Answer

Related Solutions

[Tex/LaTex] Aligning sub-equations within align

[Tex/LaTex] Problems with alignment of sequences

Related Question