\thanks{} footnote indented when using amsart and doc

Question

When using the amsart document class in combination with the doc package, I get an extra indent in the thanks footnote of the first author:

\documentclass{amsart}
\usepackage{doc}
\begin{document}
\title{title}
\author{first author}
\thanks{thanks1}
\author{second author}
\thanks{thanks2}
\maketitle
\end{document}

yields

Is there any way to circumvent this behaviour?

Answer 1

An update of \@setthanks seems to suffice:

\documentclass{amsart}
\usepackage{doc}

\makeatletter
\def\@setthanks{\vspace{-\baselineskip}\def\thanks##1{\@par##1\@addpunct.}\thankses}
\makeatother

\begin{document}

\title{title}
\author{first author}
\thanks{thanks1}
\author{second author}
\thanks{thanks2}

\maketitle

\end{document}

amsart mentions

In order to make multiple thanks footnotes work inside a single \@footnotetext argument we need to make the first \par be ignored. Cf. \@setthanks.

and then sets \def\par{\let\par\@par} as the first thing in \@footnotetext. So, using \@par from the start with every \thanks introduces the vertical skip which is reverted using \vspace{-\baselineskip}.

Answer 2

patch the portions of the \maketitle command in doc.sty that set the footnote indentation to use the values from amsart:

\documentclass{amsart}
\usepackage{etoolbox}
\usepackage{doc}
\patchcmd\maketitle
  {\parindent 1em}{\parindent\normalparindent}%
  {}{}
\patchcmd\maketitle
  {\hbox to1.8em}{\hbox to\normalparindent}%
  {}{}
\begin{document}
\title{title}
\author{first author}
\thanks{thanks1}
\author{second author}
\thanks{thanks2}
\maketitle
\end{document}

Answer 3

You could for example change the definition of \@makefntext in the definition of \maketitle by the doc package.

\documentclass{amsart}
\usepackage{doc}
\makeatletter
\def\maketitle{\par
      \begingroup
        \def\thefootnote{\fnsymbol{footnote}}%
      \setcounter{footnote}\z@
      \def\@makefnmark{\hbox to\z@{$\m@th^{\@thefnmark}$\hss}}%
      \long\def\@makefntext##1{\noindent
          \ifnum\c@footnote>\z@\relax
            \hbox to1.8em{\hss$\m@th^{\@thefnmark}$}##1%
          \else
          \hbox to1.8em{\hfill}%
            \parbox{\dimexpr\linewidth-1.8em}{\raggedright ##1}%
          \fi}
      \if@twocolumn\twocolumn[\@maketitle]%
      \else\newpage\global\@topnum\z@\@maketitle\fi
      \thispagestyle{titlepage}\@thanks\endgroup
      \setcounter{footnote}\z@
      \gdef\@date{\today}\gdef\@thanks{}%
      \gdef\@author{}\gdef\@title{}}


\makeatother
\begin{document}
\title{title\footnote{A footnote}\footnote{Another footnote}}
\author{first author}
\thanks{thanks1}
\author{second author}
\thanks{thanks2}
\maketitle
\end{document}

Answer 4

The problem is that the doc package redefines \maketitle, the main purpose seems to be allowing several titles in one document: The documentation says

For the same reason the \maketitle command is slightly changed to allow multiple titles in one document. So you can make one driver file reading in several articles at once. To avoid an unwanted pagestyle on the title page the \maketitle command issues a \thispagestyle{titlepage} declaration which produces a plain page if the titlepage page style is undefined.

The simple solution is to just redefine \maketitle with the amsart definition:

\documentclass{amsart}
\usepackage{doc}
% doc package redefines \maketitle, this is taken from amsart.cls
\makeatletter
\def\maketitle{\par
  \@topnum\z@ % this prevents figures from falling at the top of page 1
  \@setcopyright
  \thispagestyle{firstpage}% this sets first page specifications
  \uppercasenonmath\shorttitle
  \ifx\@empty\shortauthors \let\shortauthors\shorttitle
  \else \andify\shortauthors
  \fi
  \@maketitle@hook
  \begingroup
  \@maketitle
  \toks@\@xp{\shortauthors}\@temptokena\@xp{\shorttitle}%
  \toks4{\def\\{ \ignorespaces}}% defend against questionable usage
  \edef\@tempa{%
    \@nx\markboth{\the\toks4
      \@nx\MakeUppercase{\the\toks@}}{\the\@temptokena}}%
  \@tempa
  \endgroup
  \c@footnote\z@
  \@cleartopmattertags
}
\makeatother
\begin{document}
\title{title}
\author{first author}
\thanks{thanks1}
\author{second author}
\thanks{thanks2}
\maketitle
\end{document}

Compiles to yield

as required.

However, I expect there is some "cleaner" version, in particular in case anyone is interested in using the extra features of the doc version of \maketitle...

Answer 5

All the answers correct the \maketitle made by doc package. Although IMO this is the logical/right approach, a solution with \makeatletter ... stuffs is not easy to remember. So my solution is make a fake thanks with a simple footnotes without marks after \maketitle. Surely someone will find this a bad practice, but far I can see this do not break anything in this way:

\documentclass{amsart}
\usepackage{doc}
\def\thanks#1{{\let\thefootnote\relax\footnote{#1.}\setcounter{footnote}{0}}}
\begin{document}
\author{first author}
\author{second author}
\title{title}
\maketitle
\thanks{thanks1}
\thanks{thanks2}
Some  text\footnote{A normal footnote.}
\end{document}