1

I face the following

enter image description here

Here all are appears below one by one. Actually I want, the last five are appears in the RHS of the first five. That is , how to align equally in the middle for a good look?

For this, I typed

  \begin{enumerate}
  \item $f:\Bbb R \to \Bbb R, x \mapsto \ln x$ 
  \item $f:\Bbb R \to \Bbb R, x \mapsto [x]$
  \item $f:\Bbb R \to \Bbb R, x \mapsto \frac{1}{x}$
  \item $f:\Bbb R \to \Bbb R, x \mapsto \tan x$ 
  \item $f:\Bbb R \to \Bbb R, x \mapsto \sqrt{x}$
  \item $f:\Bbb N \to \Bbb Z, x \mapsto 5$
  \item $f:\Bbb R \to \Bbb R, x \mapsto e^x$
  \item $f:\Bbb N \to \Bbb N, x \mapsto 2^x$
  \item $f:\Bbb R \to \Bbb R, x \mapsto \sin x$
  \item $f:\Bbb R \to \Bbb R, x \mapsto x^2$
  \end{enumerate}

Any help?

2
  • The command \Bbb has been deprecated for more than 20 years. The correct call is \mathbb{R}. Also, you should have two formulas per line, like $f\colon\mathbb{R}\to\mathbb{R}$, $x\mapsto\log x$. – egreg Jul 1 '19 at 16:30
  • In my opinion, it's more sensible to have the numbering horizontally first, then vertically. – Bernard Jul 1 '19 at 18:09
4

One way is to use multicols and to resume numbering at 5 in the second column. lipsum is just to show it merges into surrounding text.

\documentclass{article} 
\usepackage{amssymb}
\usepackage{multicol}
\usepackage{lipsum}
\begin{document}
\lipsum[1]
\begin{multicols}{2}
\begin{enumerate}
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \ln x$ 
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto [x]$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \frac{1}{x}$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \tan x$ 
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \sqrt{x}$
\end{enumerate}
\columnbreak
\begin{enumerate}  \setcounter{enumi}{5}
  \item $f:\mathbb{N} \to \mathbb{Z}, x \mapsto 5$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto e^x$
  \item $f:\mathbb{N} \to \mathbb{N}, x \mapsto 2^x$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \sin x$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto x^2$
  \end{enumerate}
\end{multicols}  
\lipsum[2]
\end{document}

enter image description here

Or without lipsum and more importantly with @egreg's hint.

\documentclass{article} 
\usepackage{amssymb}
\usepackage{multicol}
\begin{document}
\begin{multicols}{2}
\begin{enumerate}
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \ln x$ 
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto [x]$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \frac{1}{x}$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \tan x$ 
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \sqrt{x}$
\columnbreak
  \item $f:\mathbb{N} \to \mathbb{Z}, x \mapsto 5$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto e^x$
  \item $f:\mathbb{N} \to \mathbb{N}, x \mapsto 2^x$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto \sin x$
  \item $f:\mathbb{R} \to \mathbb{R}, x \mapsto x^2$
  \end{enumerate}
\end{multicols}  
\end{document}
7
  • sir.... before and after the equtions, texts like Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Ut purus elit, vestibulum ut, placerat ac, ..... are appears. How to remove this? – Chinz Jul 1 '19 at 16:28
  • 1
    Just a single enumerate environment suffices. – egreg Jul 1 '19 at 16:29
  • @Chinz Just remove \lipsum[1] and \lipsum[2]. – user121799 Jul 1 '19 at 16:29
  • @egreg That's a very good point. I was not aware of that! Mille grazie! – user121799 Jul 1 '19 at 16:30
  • @marmot: Its working! thank you sir..! – Chinz Jul 1 '19 at 16:31

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