The following MWE (or MNWE) breaks with the error

Extra \fi. <argument> ...rrenvir \else \@badend {tabular}\fi \expandafter \endgroup \if... l.5 \author{You \and me}

Removing the \and command fixes it. tufte-book throws the same error. article or similar classes, of course, don't, and neither will the tufte classes break if the \and is removed.

\title{Your Paper}
\author{You \and me}
  • 3
    tufte doesn't define \and you have to type You and Me or You, me. That all. If not you have to define \author by yourself.
    – user11232
    Commented Aug 23, 2014 at 13:05
  • @HarishKumar Indeed, especially if you can shed light on whether that's by design or just an omission, but I'll accept it as an answer either way unless someone else has more information
    – ThomasH
    Commented Sep 1, 2014 at 17:04
  • @PaulGessler I just did :-)
    – user11232
    Commented Sep 3, 2014 at 6:50

2 Answers 2


tufte class doesn't define \and. Though I can not say whether it is by design or the authors missed it by accident precisely, I am inclined to believe that it is a design decision by the authors.

If you have to print two authors, you will have limited options like typing You and Me or You, Me by yourself. If not happy with this, you will have to define your own \and. But for this additional details like what that \and should do etc are needed and I beleive, is out of scope here.


In LaTeX base, \and is defined as follows:

\DeclareRobustCommand\and{%   % \begin{tabular}
  \hskip 1em \@plus.17fil%
  \begin{tabular}[t]{c}}%     % \end{tabular}

source: https://github.com/latex3/latex2e/blob/d3601236b649b7b280e32d494eae71d561f869a5/base/ltsect.dtx#L172-L175.

And, the same file shows that \and is used as a separator for all the authors. I'm not sure whether I fully understand it, but it seems that the authors are put each in a separate table.

So, depending on the project, you could try to copy this definition and get that to work. Or, do something simple like

\author{\noindent{Author 1}\\[3mm] \noindent{Author2}\\[3mm]}

EDIT: \author is defined as follows in the Tufte class:

\let\@author\@empty% suppress default latex.ltx ``no author'' warning
    % TODO store contents of \thanks command
    \renewcommand{\thanks}[1]{}% swallow \thanks contents
    {\renewcommand{\plainauthor}{\thanklessauthor}}% use thankless author
    {\renewcommand{\plainauthor}{#1}}% use provided plain-text author
    {}% hyperref is not loaded; do nothing
    {\hypersetup{pdfauthor={\plainauthor}}}% set the PDF metadata author

source: https://github.com/Tufte-LaTeX/tufte-latex/blob/efb8c8e836890bad71fb5834acdd316ebde6db12/tufte-common.def#L592-L606.

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