Same affiliation for all authors without extra packages

Question

I have a working paper with a colleague from the same institution, so we entered:

\author{A B \and C d}

how can I now add affiliation, so that its for both authors (centred), and not only for one of them? I would prefer not to use extra packages if possible.

Answer 1

The simplest solution (which is not to say it is the best) is not to use \and.

\documentclass{article}
\title{Foo}
\author{Author One\qquad Author Two\\Affiliation}
\begin{document}
\maketitle
\end{document}

Answer 2

At the moment I see no other solution than using e. g. the authblk package. For details please refer to the package manual.

\documentclass[11pt,a4paper,english]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{authblk}
\usepackage{blindtext}

\title{Two Authors with same Affiliation}
\author{Author One}
\author{Author Two}
\affil{Affiliation}

\begin{document}
  \maketitle

  \blinddocument
\end{document}

The blindtext package is only for creating dummy text thus not part of the solution

Answer 3

For cleaner definition, another solution is to use the \publishers{} field of Koma-Script classes.

\documentclass{scrartcl}
\title{Foo}
\author{Author One \and Author Two}
\publishers{Affiliation}
\date{\today}                          %or \date{} to not print date
\begin{document}
    \maketitle
\end{document}

N.B.: use \and between each authors.

Answer 4

Here's my usual trick. (My coauthor taught me this; I've met at least one person who really hates it based on semantic markup reasons, but I like it.)

\documentclass{article}
\title{Foo}
\author{Author One\and Author Two}
\date{Affiliation}
\begin{document}
\maketitle
\end{document}