我正在尝试上传一份 pdfLaTex 文档https://arxiv.org/。编译后，我注意到以下情况。
LaTeX 警告：标签可能已更改。请重新运行以获取正确的交叉引用。
我的代码除了这种警告外，其他都很好。我从中了解到以下事实网站：
第一次运行 LaTeX 时，它会记录下所有标签和参考文献，并将这些信息放入辅助文件中，然后您需要再次运行 LaTeX，而无需更改源 tex 文件，以便 LaTeX 从辅助文件中获取信息并理清哪些是参考文献。
但是 arxiv 编译器只运行一次代码。这意味着每次我运行代码时，它都会显示相同的警告。
问题：有办法解决这个问题吗？
就像重新编译两次相同的代码。
我在 arxiv 上运行的示例代码得到了相同的警告：
\pdfminorversion=4
\documentclass{amsart}
\usepackage[utf8]{inputenc}
\usepackage{amsmath}
\title{Sample File}
\author{}
\date{}
\usepackage{amsthm}
\RequirePackage[bookmarks, bookmarksopen=true, plainpages=false, pdfpagelabels, pdfpagelayout=SinglePage]{hyperref}
\usepackage[nameinlink, noabbrev,capitalize]{cleveref}
\usepackage{xcolor}
\hypersetup{
colorlinks,
linkcolor={red!50!black},
citecolor={red!50!black},
urlcolor={red!80!black}
}
\newtheorem{theorem}{Theorem}
\begin{document}
\maketitle
\section{Introduction}
\begin{theorem}
Statement of the theorem. \label{Theorem1}
\end{theorem}
\begin{proof}
Here is the proof of \Cref{Theorem1}. See \cite{book}
\end{proof}
\begin{theorem}
Statement of the theorem. \label{theorem2}
\end{theorem}
\begin{proof}
Here is the proof of \hyperref[theorem2]{Theorem 2}.
\end{proof}
\bibliographystyle{alpha}
\bibliography{bibliography.bib}
\end{document}
Highlighted AutoTeX Log:
[verbose]: Creating arXiv submission AutoTeX object
[verbose]: *** Using TeX Live 2020 ***
[verbose]: Calling arXiv submission AutoTeX process
[verbose]: TeX/AutoTeX.pm: admin_timeout = minion
[verbose]: <main.tex> is of type 'LATEX2e'.
[verbose]: <bibliography.bib> is of type 'BiBTeX'.
[verbose]: <main.bbl> is of type 'TeX auxiliary'.
[verbose]: ~~~~~~~~~~~ Processing file 'main.tex'
[verbose]: TEXMFCNF is unset.
[verbose]: ~~~~~~~~~~~ Running latex for the first time ~~~~~~~~
[verbose]: Running: "(export HOME=/tmp PATH=/texlive/2020/bin/arch:/bin; cd /submissions/4345876/ && latex 'main.tex' < /dev/null)" 2>&1
[verbose]: This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=latex)
restricted \write18 enabled.
entering extended mode
(./main.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-09-06>
(/texlive/2020/texmf-dist/tex/latex/amscls/amsart.cls
Document Class: amsart 2020/05/29 v2.20.6
(/texlive/2020/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/texlive/2020/texmf-dist/tex/latex/amsmath/amstext.sty
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(/texlive/2020/texmf-dist/tex/latex/hyperref/hdvips.def
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(/texlive/2020/texmf-dist/tex/generic/uniquecounter/uniquecounter.sty))))
(/texlive/2020/texmf-dist/tex/latex/cleveref/cleveref.sty)
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No file main.aux.
(/texlive/2020/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/texlive/2020/texmf-dist/tex/latex/amsfonts/umsb.fd)
(/texlive/2020/texmf-dist/tex/latex/hyperref/nameref.sty
(/texlive/2020/texmf-dist/tex/latex/refcount/refcount.sty)
(/texlive/2020/texmf-dist/tex/generic/gettitlestring/gettitlestring.sty))
Package hyperref Warning: Rerun to get /PageLabels entry.
LaTeX Warning: Reference `Theorem1' on page 1 undefined on input line 34.
LaTeX Warning: Citation `book' on page 1 undefined on input line 34.
LaTeX Warning: Hyper reference `theorem2' on page 1 undefined on input line 41.
(./main.bbl) [1] (./main.aux)
Package rerunfilecheck Warning: File `main.out' has changed.
(rerunfilecheck) Rerun to get outlines right
(rerunfilecheck) or use package `bookmark'.
LaTeX Warning: There were undefined references.
LaTeX Warning: Label(s) may have changed. Rerun to get cross-references right.
)
Output written on main.dvi (1 page, 4112 bytes).
Transcript written on main.log.
[verbose]: ~~~~~~~~~~~ Running latex for the second time ~~~~~~~~
[verbose]: Running: "(export HOME=/tmp PATH=/texlive/2020/bin/arch:/bin; cd /submissions/4345876/ && latex 'main.tex' < /dev/null)" 2>&1
[verbose]: This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020) (preloaded format=latex)
restricted \write18 enabled.
entering extended mode
(./main.tex
LaTeX2e <2020-02-02> patch level 5
L3 programming layer <2020-09-06>
(/texlive/2020/texmf-dist/tex/latex/amscls/amsart.cls
Document Class: amsart 2020/05/29 v2.20.6
(/texlive/2020/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/texlive/2020/texmf-dist/tex/latex/amsmath/amstext.sty
(/texlive/2020/texmf-dist/tex/latex/amsmath/amsgen.sty))
(/texlive/2020/texmf-dist/tex/latex/amsmath/amsbsy.sty)
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(/texlive/2020/texmf-dist/tex/latex/amsfonts/umsa.fd)
(/texlive/2020/texmf-dist/tex/latex/amsfonts/amsfonts.sty))
(/texlive/2020/texmf-dist/tex/latex/base/inputenc.sty)
(/texlive/2020/texmf-dist/tex/latex/hyperref/hyperref.sty
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(/texlive/2020/texmf-dist/tex/generic/pdftexcmds/pdftexcmds.sty
(/texlive/2020/texmf-dist/tex/generic/infwarerr/infwarerr.sty))
(/texlive/2020/texmf-dist/tex/latex/graphics/keyval.sty)
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(/texlive/2020/texmf-dist/tex/generic/uniquecounter/uniquecounter.sty))))
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' TeX output 2022.06.08:0906' -> main.ps
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答案1
TLDR：这是一类在第一次运行中总是可以忽略的警告。
arXiv 至少处理两次（如果第一次成功），最多处理四次。如果您使用任何文档内\ref-type 命令，此警告将始终出现在第一次 tex 传递中；\cite如果您没有在括号中提供 alt-tex，则在所有 -type 命令中都会出现此警告。如果您阅读第二次传递，您会注意到这种情况没有再次发生，因为引用和参考文献现在已在.aux系统生成的文件中解析。
原因是：即使您将文件作为包的一部分上传，它也会被 autotex 忽略（并删除），并且由于文件尚未填充，.aux因此交叉引用/引文将不会在第一遍中链接。.aux