Aligning formulas within itemize

Question

I would like to write two equations side by side within a list (itemize). I have tried as follows:

\begin{itemize}
   \item first item:
        \begin{align}
              x = y && a = b
        \end{align}
   \item second item:
        \begin{align}
           x = y1+x3+253+x && a = 3*b_1
        \end{align}
\end{itemize}

Between the two formulas I would like to write 'or' instead of leaving a blank space. And also, trying to align all of them (centering?).

Do you know how I can do that?

My idea is to use fixed tab stops. https://stackoverflow.com/questions/2558503/how-to-set-tab-stops-after-whitespaces-in-latex — Harald Lichtenstein, Mar 24 '21 at 21:40
@HaraldLichtenstein, how I could replace or (not the logic symbol, just characters) between the equations? — Math, Mar 24 '21 at 21:47
Would "\item [] or" work for you? https://tex.stackexchange.com/questions/50269/itemize-without-bullets — Harald Lichtenstein, Mar 24 '21 at 22:07

Sebastiano · Answer 1 · 2021-03-24T22:42:19.923

3

Being the presence of \hspace into the enviroment aligned...all it has been done manually...If you change the formulas into the aligned you must set (with the eyes) the correct distance.

\documentclass[a4paper,12pt]{article}
\usepackage{mathtools,amssymb}
\begin{document}
\begin{itemize}
   \item first item:
        $\begin{aligned}[c]
         &\hspace{1.4cm} & x = y & \hspace{3.15cm} & a = b & \hspace{3.03cm} (1)
      \end{aligned}$
   \item second item: 
   $\begin{aligned}[c]
         & x = y1+x3+253+x & \hspace{1.33cm} & a = 3*b_1 & \hspace{1.9cm} (2)
      \end{aligned}$  
        \item third item:
         $\begin{aligned}[c]
         &\hspace{1.2cm} & x = y & \hspace{3.2cm} & a = b & \hspace{3cm} (3)
      \end{aligned}$  
\end{itemize}
\end{document}

edited Mar 24 '21 at 22:42

answered Mar 24 '21 at 21:59

Sebastiano

54,118

Hi Sebastiano, yes. But this should be already reproduced by the code provided. I would like to put 'or' between the two formulas in (1), similarly in (2) and (3). And whether possible, just for aesthetics, to center the formula in order to have a in (1), (2) and (3) almost aligned – Math Mar 24 '21 at 22:08
1

@Math I think that the output (seem) to have the correct alignment :-) – Sebastiano Mar 24 '21 at 22:44

score 3 · Accepted Answer · answered Mar 24 '21 at 23:04

Another possibility would be to mimic an itemize environment within align* or alignat* with \intertext:

\documentclass{article}
\usepackage{mathtools}
\newcommand{\myintertext}[1]{\intertext{\makebox[\leftmargini][r]{\textbullet\hspace{\labelsep}}#1}}
\begin{document}
\begin{itemize}
   \item first item:
        \begin{align}
              x = y && a = b
        \end{align}
   \item second item:
        \begin{align}
           x = y1+x3+253+x && a = 3*b_1
        \end{align}
\end{itemize}
\begin{alignat}{3}
  \myintertext{first item}
x & =y & \makebox[4em]{or} & & a & = b \
  \myintertext{second item}
           x & = y1+x3+253+x & \makebox[4em]{or} & & a & = 3*b_1
\end{alignat}
\end{document}

Aligning formulas within itemize

2 Answers2